63o - hand vs Private Joker

[brick]

I can't imagine he would 3-bet with AA, KK or QQ here unless he thinks you're trying to check raise him off his big pair.
Does he think you might check raise a single pair here?

If he suspects you have two small pair then I would imagine he would just call hoping to counterfit you. By 3-betting he's saying "I have you crushed."