Hello,
Your 3bet size is not right, you give good odds to the table to call and your hand will be very difficult to play against multiple opponents and more likely out of position if this is a full ring.
Now after sb's call and utg's shove I don't mind to fold JJ here, unless utg is a maniac style capable to do that often with a wide range. The best scenario is that he's doing that with a lower pair than JJ, probably 1010 or 99 if that's the case (I don't think 88 or lower are very possible). Else you are either flipping or being destroyed.
I would fold here too.