If you delete a user profile, you also delete the properties and values for that user. Personalized links and alerts for that user are also deleted. Though you can import any properties mapped to Microsoft Active Directory directory service during the next scheduled import, you permanently lose any custom properties that you added. You also lose any values for properties mapped to Active Directory that changed since the last import.
Note If you delete a user profile for a user that remains in Active Directory directory service, that user profile is automatically recreated the next time user profiles are imported.