Player betted into two players and on turn again.
On river i make Flush, i raise and he 3-bet, do we fold ?
Do he ever 3-bet here with less, ingame it was just like i cant fold to the size,also i dont lose against all flushes of course.
If he plays lot of suiited Combos i just calculate it, but is he 3-bet with a low flush ?

Against all flushes i have near 50% if he completes wide, but of course i dont know if he 3-bet them.

I only need 29% Equity, so propably this call is o.k., first trhought it isnt, also didnt noted the player as fish and had no stats.

888 Poker - $0.10 NL (6 max) FAST - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 100 BB (VPIP: 21.93, PFR: 16.94, 3Bet Preflop: 5.13, Hands: 311)
SB: 241.3 BB (VPIP: 59.38, PFR: 21.88, 3Bet Preflop: 14.29, Hands: 33)
Hero (BB): 101.5 BB
UTG: 95 BB (VPIP: 42.11, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 19)
MP: 169 BB (VPIP: 22.35, PFR: 18.66, 3Bet Preflop: 7.89, Hands: 445)
CO: 120.8 BB (VPIP: 20.04, PFR: 16.57, 3Bet Preflop: 5.06, Hands: 2,880)

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has J 2

UTG calls 1 BB, fold, fold, fold, SB calls 0.5 BB, Hero checks

Flop: (3 BB, 3 players) 9 J K
SB bets 1 BB, Hero calls 1 BB, UTG calls 1 BB

Turn: (6 BB, 3 players) 8
SB bets 2.8 BB, Hero calls 2.8 BB, fold

River: (11.6 BB, 2 players) 5
SB bets 5.5 BB, Hero raises to 16.8 BB, SB raises to 49.1 BB, Hero ?

Pretty gross but im folding here no problem.

Fold looks ok here

It's marginal.
I think Q high flush would be closer to a profitable call since we beat more flush combos than with the J high flush. I wouldn't be surprised to see lower flushes 3bet here especially from such a villain, however the frequencies are definitely not as high as when doing this with NFD, and there are lesser combinations possible with lower flushes. So less combos + less frequency which may still be around the 25% part of his range for making the call profitable, but still marginal.