I have not deleted any squad forums, in quite some time.
They only get deleted when they have been inactive for over six months.
It is more likely you have been ejected from a private forum, if you can no longer see it.
What forum?
To answer the question more directly. We have a policy which prevents any HTC member from entering a private squad forum.
By the way, if anyone wants to address a question with me, the best method is email, phone, or PM on the bulletin board. Bringing it to the public forums seldom works out and I usually ignore such things.