UCMA 3.0: Notifications for UNSubscribe events?

Hello,

  I established a UserEndpoint where I get notifications via LocalOwnerPresence.SubscriberNotificationReceived when when other users subscribe to my UserEndpoint (e.g Add my UserEndpoint to their contact list).  Is there a means to receiving a notification when these same users unsubscribe to my UserEndpoint (e.g. remove my UserEndpoint from their Contact list.)?

Thanks,

Matt