diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/Dict.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/Dict.java
index 1b5fe8f10b93caa56d6aa5b0c12757cd52b7baf5..fe3ba287f1f3913c0f3d5a7c493152d2c98fc6fb 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/Dict.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/Dict.java
@@ -508,6 +508,12 @@ public abstract class Dict
 
     public static final String DELETE_PROGRESS_MESSAGE = "delete_progress_message";
 
+    public static final String CANNOT_MODIFY_DELETED_ENTITY_TITLE =
+            "cannot_modify_deleted_entity_title";
+
+    public static final String CANNOT_MODIFY_DELETED_ENTITY_MSG =
+            "cannot_modify_deleted_entity_msg";
+
     //
     // Sample Viewer
     //
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/grid/AbstractBrowserGrid.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/grid/AbstractBrowserGrid.java
index 80a54771a85d2eb3518e85a8c324d3a9dd2b0970..c40c4a430f46c83969ce705b9813c08cb0c5f9be 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/grid/AbstractBrowserGrid.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/grid/AbstractBrowserGrid.java
@@ -103,6 +103,7 @@ import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.columns
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.columns.specific.GridCustomColumnDefinition;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.grid.BrowserGridPagingToolBar.PagingToolBarButtonKind;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.grid.expressions.filter.FilterToolbar;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.listener.OpenEntityEditorTabClickListener;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.widget.IDataRefreshCallback;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.util.GWTUtils;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.util.GWTUtils.DisplayInfoTime;
@@ -387,6 +388,10 @@ public abstract class AbstractBrowserGrid<T/* Entity */, M extends BaseEntityMod
     protected void showEntityInformationHolderViewer(IEntityInformationHolderWithPermId entity,
             boolean editMode, boolean inBackground)
     {
+        if (OpenEntityEditorTabClickListener.forbidDeletedEntityModification(viewContext, entity))
+        {
+            return;
+        }
         final EntityKind entityKind = entity.getEntityKind();
         final AbstractTabItemFactory tabView;
         BasicEntityType entityType = entity.getEntityType();
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/listener/OpenEntityEditorTabClickListener.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/listener/OpenEntityEditorTabClickListener.java
index 02f0e474187509deea481a1bab2076b66920612d..78930ee19c014990bef0a8db38d1af500cb4b5fb 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/listener/OpenEntityEditorTabClickListener.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/listener/OpenEntityEditorTabClickListener.java
@@ -16,15 +16,19 @@
 
 package ch.systemsx.cisd.openbis.generic.client.web.client.application.ui.listener;
 
+import com.extjs.gxt.ui.client.widget.MessageBox;
 import com.google.gwt.event.dom.client.ClickEvent;
 import com.google.gwt.event.dom.client.ClickHandler;
 
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.Dict;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.IViewContext;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.framework.AbstractTabItemFactory;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.framework.DispatcherHelper;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.plugin.IClientPlugin;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.plugin.IClientPluginFactory;
+import ch.systemsx.cisd.openbis.generic.client.web.client.application.util.IMessageProvider;
 import ch.systemsx.cisd.openbis.generic.client.web.client.application.util.WidgetUtils;
+import ch.systemsx.cisd.openbis.generic.shared.basic.DeletionUtils;
 import ch.systemsx.cisd.openbis.generic.shared.basic.IEntityInformationHolder;
 import ch.systemsx.cisd.openbis.generic.shared.basic.IIdAndCodeHolder;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.BasicEntityType;
@@ -59,6 +63,10 @@ public final class OpenEntityEditorTabClickListener implements ClickHandler
             IEntityInformationHolder entity, boolean inBackground)
     {
         assert entity != null : "entity is not provided";
+        if (forbidDeletedEntityModification(viewContext, entity))
+        {
+            return;
+        }
         final AbstractTabItemFactory tabView;
         // NOTE: most plugins require a specific type class here!
         BasicEntityType entityType = entity.getEntityType();
@@ -72,4 +80,21 @@ public final class OpenEntityEditorTabClickListener implements ClickHandler
         tabView.setInBackground(inBackground);
         DispatcherHelper.dispatchNaviEvent(tabView);
     }
+
+    public static boolean forbidDeletedEntityModification(IMessageProvider messageProvider,
+            IEntityInformationHolder entity)
+    {
+        if (DeletionUtils.isDeleted(entity))
+        {
+            String title =
+                    messageProvider.getMessage(Dict.CANNOT_MODIFY_DELETED_ENTITY_TITLE, entity
+                            .getEntityKind().getDescription());
+            String msg =
+                    messageProvider.getMessage(Dict.CANNOT_MODIFY_DELETED_ENTITY_MSG, entity
+                            .getEntityKind().getDescription(), entity.getCode());
+            MessageBox.alert(title, msg, null);
+            return true;
+        }
+        return false;
+    }
 }
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/public/common-dictionary.js b/openbis/source/java/ch/systemsx/cisd/openbis/public/common-dictionary.js
index ba0b829f204656f67ca205bb05fc9f67a250c5aa..169b3cc0c4d57e7fd65215c4370833aecb726067 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/public/common-dictionary.js
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/public/common-dictionary.js
@@ -72,6 +72,8 @@ var common = {
   deleting: "Deleting",
   delete_permanently_progress_message: "Deleting {0}(s)...",
   delete_progress_message: "Moving {0}(s) to trash ...",
+  cannot_modify_deleted_entity_title: "Can't modify deleted {0}",
+  cannot_modify_deleted_entity_msg": "{0} '{1}' has been moved to trash and therefore can't be modified.',
 	 
   //
   // Table Modifications