diff --git a/app/src/main/java/com/nextcloud/talk/api/NcApi.java b/app/src/main/java/com/nextcloud/talk/api/NcApi.java
index 51f343a57..e2fb846ab 100644
--- a/app/src/main/java/com/nextcloud/talk/api/NcApi.java
+++ b/app/src/main/java/com/nextcloud/talk/api/NcApi.java
@@ -477,6 +477,10 @@ public interface NcApi {
                                                  @Url String url,
                                                  @Field("lastReadMessage") int lastReadMessage);
 
+    // Url is: /api/{apiVersion}/chat/{token}/read
+    @DELETE
+    Observable<GenericOverall> markRoomAsUnread(@Header("Authorization") String authorization, @Url String url);
+
     /*
     Server URL is: baseUrl + ocsApiVersion + spreedApiVersion + /listed-room
     */
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
index 11fb1eef3..2d2b07a0d 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
+++ b/app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt
@@ -3028,7 +3028,7 @@ class ChatController(args: Bundle) :
         if (chatMessage!!.previousMessageId > NO_PREVIOUS_MESSAGE_ID) {
             ncApi.setChatReadMarker(
                 credentials,
-                ApiUtils.getUrlForSetChatReadMarker(
+                ApiUtils.getUrlForChatReadMarker(
                     ApiUtils.getChatApiVersion(conversationUser, intArrayOf(ApiUtils.APIv1)),
                     conversationUser?.baseUrl,
                     roomToken
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/ConversationOperationEnum.kt b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/ConversationOperationEnum.kt
index 45c20b032..1e5979d7b 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/ConversationOperationEnum.kt
+++ b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/ConversationOperationEnum.kt
@@ -25,6 +25,7 @@ enum class ConversationOperationEnum {
     OPS_CODE_GET_AND_JOIN_ROOM,
     OPS_CODE_INVITE_USERS,
     OPS_CODE_MARK_AS_READ,
+    OPS_CODE_MARK_AS_UNREAD,
     OPS_CODE_REMOVE_FAVORITE,
     OPS_CODE_ADD_FAVORITE,
     OPS_CODE_JOIN_ROOM
diff --git a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.kt b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.kt
index 1fde700a1..7f71f8b9b 100644
--- a/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.kt
+++ b/app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.kt
@@ -214,6 +214,7 @@ class OperationsMenuController(args: Bundle) : BaseController(
             ConversationOperationEnum.OPS_CODE_GET_AND_JOIN_ROOM -> operationGetAndJoinRoom()
             ConversationOperationEnum.OPS_CODE_INVITE_USERS -> operationInviteUsers()
             ConversationOperationEnum.OPS_CODE_MARK_AS_READ -> operationMarkAsRead()
+            ConversationOperationEnum.OPS_CODE_MARK_AS_UNREAD -> operationMarkAsUnread()
             ConversationOperationEnum.OPS_CODE_REMOVE_FAVORITE,
             ConversationOperationEnum.OPS_CODE_ADD_FAVORITE -> operationToggleFavorite()
             ConversationOperationEnum.OPS_CODE_JOIN_ROOM -> operationJoinRoom()
@@ -249,7 +250,7 @@ class OperationsMenuController(args: Bundle) : BaseController(
     private fun operationMarkAsRead() {
         ncApi.setChatReadMarker(
             credentials,
-            ApiUtils.getUrlForSetChatReadMarker(
+            ApiUtils.getUrlForChatReadMarker(
                 chatApiVersion(),
                 currentUser!!.baseUrl,
                 conversation!!.token
@@ -262,6 +263,21 @@ class OperationsMenuController(args: Bundle) : BaseController(
             .subscribe(GenericOperationsObserver())
     }
 
+    private fun operationMarkAsUnread() {
+        ncApi.markRoomAsUnread(
+            credentials,
+            ApiUtils.getUrlForChatReadMarker(
+                chatApiVersion(),
+                currentUser!!.baseUrl,
+                conversation!!.token
+            )
+        )
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
+            .retry(1)
+            .subscribe(GenericOperationsObserver())
+    }
+
     private fun operationRenameRoom() {
         ncApi.renameRoom(
             credentials,
diff --git a/app/src/main/java/com/nextcloud/talk/receivers/MarkAsReadReceiver.kt b/app/src/main/java/com/nextcloud/talk/receivers/MarkAsReadReceiver.kt
index 7426293aa..9486804cd 100644
--- a/app/src/main/java/com/nextcloud/talk/receivers/MarkAsReadReceiver.kt
+++ b/app/src/main/java/com/nextcloud/talk/receivers/MarkAsReadReceiver.kt
@@ -83,7 +83,7 @@ class MarkAsReadReceiver : BroadcastReceiver() {
     private fun markAsRead() {
         val credentials = ApiUtils.getCredentials(currentUser.username, currentUser.token)
         val apiVersion = ApiUtils.getChatApiVersion(currentUser, intArrayOf(1))
-        val url = ApiUtils.getUrlForSetChatReadMarker(
+        val url = ApiUtils.getUrlForChatReadMarker(
             apiVersion,
             currentUser.baseUrl,
             roomToken
diff --git a/app/src/main/java/com/nextcloud/talk/ui/dialog/ConversationsListBottomDialog.kt b/app/src/main/java/com/nextcloud/talk/ui/dialog/ConversationsListBottomDialog.kt
index 8dd0caf72..abc87eaf6 100644
--- a/app/src/main/java/com/nextcloud/talk/ui/dialog/ConversationsListBottomDialog.kt
+++ b/app/src/main/java/com/nextcloud/talk/ui/dialog/ConversationsListBottomDialog.kt
@@ -42,6 +42,7 @@ import com.nextcloud.talk.controllers.ConversationsListController
 import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum
 import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum.OPS_CODE_ADD_FAVORITE
 import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum.OPS_CODE_MARK_AS_READ
+import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum.OPS_CODE_MARK_AS_UNREAD
 import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum.OPS_CODE_REMOVE_FAVORITE
 import com.nextcloud.talk.controllers.bottomsheet.ConversationOperationEnum.OPS_CODE_RENAME_ROOM
 import com.nextcloud.talk.controllers.bottomsheet.EntryMenuController
@@ -118,6 +119,10 @@ class ConversationsListBottomDialog(
             conversation.unreadMessages > 0 && CapabilitiesUtilNew.canSetChatReadMarker(currentUser)
         )
 
+        binding.conversationOperationMarkAsUnread.visibility = setVisibleIf(
+            conversation.unreadMessages <= 0 && CapabilitiesUtilNew.canMarkRoomAsUnread(currentUser)
+        )
+
         binding.conversationOperationRename.visibility = setVisibleIf(
             conversation.isNameEditable(currentUser)
         )
@@ -185,6 +190,10 @@ class ConversationsListBottomDialog(
         binding.conversationOperationMarkAsRead.setOnClickListener {
             executeOperationsMenuController(OPS_CODE_MARK_AS_READ)
         }
+
+        binding.conversationOperationMarkAsUnread.setOnClickListener {
+            executeOperationsMenuController(OPS_CODE_MARK_AS_UNREAD)
+        }
     }
 
     private fun executeOperationsMenuController(operation: ConversationOperationEnum) {
diff --git a/app/src/main/java/com/nextcloud/talk/utils/ApiUtils.java b/app/src/main/java/com/nextcloud/talk/utils/ApiUtils.java
index 9e1d9868b..fe40815d9 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/ApiUtils.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/ApiUtils.java
@@ -429,7 +429,7 @@ public class ApiUtils {
             "/hovercard/v1/" + userId;
     }
 
-    public static String getUrlForSetChatReadMarker(int version, String baseUrl, String roomToken) {
+    public static String getUrlForChatReadMarker(int version, String baseUrl, String roomToken) {
         return getUrlForChat(version, baseUrl, roomToken) + "/read";
     }
 
diff --git a/app/src/main/java/com/nextcloud/talk/utils/database/user/CapabilitiesUtilNew.kt b/app/src/main/java/com/nextcloud/talk/utils/database/user/CapabilitiesUtilNew.kt
index cb7d93e33..97a30404e 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/database/user/CapabilitiesUtilNew.kt
+++ b/app/src/main/java/com/nextcloud/talk/utils/database/user/CapabilitiesUtilNew.kt
@@ -51,6 +51,10 @@ object CapabilitiesUtilNew {
         return hasSpreedFeatureCapability(user, "chat-read-marker")
     }
 
+    fun canMarkRoomAsUnread(user: User): Boolean {
+        return hasSpreedFeatureCapability(user, "chat-unread")
+    }
+
     @JvmStatic
     fun hasSpreedFeatureCapability(user: User?, capabilityName: String): Boolean {
         if (user?.capabilities?.spreedCapability?.features != null) {
diff --git a/app/src/main/res/layout/dialog_conversation_operations.xml b/app/src/main/res/layout/dialog_conversation_operations.xml
index 0a023f6c1..7e05f329f 100644
--- a/app/src/main/res/layout/dialog_conversation_operations.xml
+++ b/app/src/main/res/layout/dialog_conversation_operations.xml
@@ -136,6 +136,36 @@
                 android:textSize="@dimen/bottom_sheet_text_size" />
         </LinearLayout>
 
+        <LinearLayout
+            android:id="@+id/conversation_operation_mark_as_unread"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/bottom_sheet_item_height"
+            android:background="?android:attr/selectableItemBackground"
+            android:gravity="center_vertical"
+            android:orientation="horizontal"
+            android:paddingStart="@dimen/standard_padding"
+            android:paddingEnd="@dimen/standard_padding"
+            tools:ignore="UseCompoundDrawables">
+
+            <ImageView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:contentDescription="@null"
+                android:src="@drawable/ic_eye_off"
+                app:tint="@color/high_emphasis_menu_icon" />
+
+            <androidx.appcompat.widget.AppCompatTextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="start|center_vertical"
+                android:paddingStart="40dp"
+                android:paddingEnd="@dimen/zero"
+                android:text="@string/nc_mark_as_unread"
+                android:textAlignment="viewStart"
+                android:textColor="@color/high_emphasis_text"
+                android:textSize="@dimen/bottom_sheet_text_size" />
+        </LinearLayout>
+
         <LinearLayout
             android:id="@+id/conversation_operation_rename"
             android:layout_width="match_parent"