diff --git a/wxPython/wx/lib/masked/maskededit.py b/wxPython/wx/lib/masked/maskededit.py
index 4bafe63712..dc78b9dc7e 100644
--- a/wxPython/wx/lib/masked/maskededit.py
+++ b/wxPython/wx/lib/masked/maskededit.py
@@ -4956,6 +4956,8 @@ class MaskedEditMixin:
         we need to pull the following trick:
         """
 ##        dbg('MaskedEditMixin::_OnFocus')
+        if self.IsBeingDeleted() or self.GetParent().IsBeingDeleted():
+            return 
         wx.CallAfter(self._fixSelection)
         event.Skip()
         self.Refresh()