You get 3bet preflop by a weakie who raises pf 4.5% of the time? And you cap? You'll need a J to win 95% of the time here, capping is spewage.

Now SB donks the flop, so you have 8-1 from the pot with probably 2 outs. Nice. Calling is absolutely HORRIBLE. If you 3bet, you can get UTG to donate with his 77 or whatever, and SB, could have AdKd I guess. I'm probably folding though.