Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs
===================================================================
diff -u -r119d7f9ec28459422a25a3aa96034cb7c7c303ac -r85530c59758c916e0a36e0fa24e138c246deca8d
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs	(.../RiskeerPlugin.cs)	(revision 119d7f9ec28459422a25a3aa96034cb7c7c303ac)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/RiskeerPlugin.cs	(.../RiskeerPlugin.cs)	(revision 85530c59758c916e0a36e0fa24e138c246deca8d)
@@ -960,7 +960,9 @@
             {
                 Text = context => noProbabilityValueDoubleConverter.ConvertToString(context.WrappedData.TargetProbability),
                 Image = context => RiskeerCommonFormsResources.GenericInputOutputIcon,
-                ContextMenuStrip = WaterLevelCalculationsForUserDefinedTargetProbabilityContextMenuStrip
+                ContextMenuStrip = WaterLevelCalculationsForUserDefinedTargetProbabilityContextMenuStrip,
+                CanRemove = (context, o) => true,
+                OnNodeRemoved = WaterLevelCalculationsForUserDefinedTargetProbabilityOnNodeRemoved
             };
 
             yield return new TreeNodeInfo<WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContext>
@@ -975,7 +977,9 @@
             {
                 Text = context => noProbabilityValueDoubleConverter.ConvertToString(context.WrappedData.TargetProbability),
                 Image = context => RiskeerCommonFormsResources.GenericInputOutputIcon,
-                ContextMenuStrip = WaveHeightCalculationsForUserDefinedTargetProbabilityContextMenuStrip
+                ContextMenuStrip = WaveHeightCalculationsForUserDefinedTargetProbabilityContextMenuStrip,
+                CanRemove = (context, o) => true,
+                OnNodeRemoved = WaveHeightCalculationsForUserDefinedTargetProbabilityOnNodeRemoved
             };
 
             yield return new TreeNodeInfo<DesignWaterLevelCalculationsGroupContext>
@@ -2432,11 +2436,20 @@
                           .AddCustomItem(waterLevelCalculationItem)
                           .AddSeparator()
                           .AddClearIllustrationPointsOfCalculationsItem(() => IllustrationPointsHelper.HasIllustrationPoints(nodeData.WrappedData.HydraulicBoundaryLocationCalculations), changeHandler)
+                          .AddDeleteItem()
                           .AddSeparator()
                           .AddPropertiesItem()
                           .Build();
         }
 
+        private static void WaterLevelCalculationsForUserDefinedTargetProbabilityOnNodeRemoved(WaterLevelCalculationsForUserDefinedTargetProbabilityContext context, object o)
+        {
+            ObservableList<HydraulicBoundaryLocationCalculationsForTargetProbability> parent = context.AssessmentSection.WaterLevelCalculationsForUserDefinedTargetProbabilities;
+
+            parent.Remove(context.WrappedData);
+            parent.NotifyObservers();
+        }
+
         private ContextMenuStrip WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContextMenuStrip(WaveHeightCalculationsForUserDefinedTargetProbabilitiesGroupContext nodeData, object parentData, TreeViewControl treeViewControl)
         {
             IAssessmentSection assessmentSection = nodeData.AssessmentSection;
@@ -2526,11 +2539,20 @@
                           .AddCustomItem(waveHeightCalculationItem)
                           .AddSeparator()
                           .AddClearIllustrationPointsOfCalculationsItem(() => IllustrationPointsHelper.HasIllustrationPoints(nodeData.WrappedData.HydraulicBoundaryLocationCalculations), changeHandler)
+                          .AddDeleteItem()
                           .AddSeparator()
                           .AddPropertiesItem()
                           .Build();
         }
 
+        private static void WaveHeightCalculationsForUserDefinedTargetProbabilityOnNodeRemoved(WaveHeightCalculationsForUserDefinedTargetProbabilityContext context, object o)
+        {
+            ObservableList<HydraulicBoundaryLocationCalculationsForTargetProbability> parent = context.AssessmentSection.WaveHeightCalculationsForUserDefinedTargetProbabilities;
+
+            parent.Remove(context.WrappedData);
+            parent.NotifyObservers();
+        }
+
         private ContextMenuStrip DesignWaterLevelCalculationsGroupContextMenuStrip(DesignWaterLevelCalculationsGroupContext nodeData, object parentData, TreeViewControl treeViewControl)
         {
             IAssessmentSection assessmentSection = nodeData.AssessmentSection;