5/10 3handed: spewing?

[oxymoron]

You say he is a TAG but this is three handed. What are his VPIP/PFR/TAF/FB/AtS numbers? At three handed it should be much higher than a six handed game. As a TAG I'm three betting 3 handed with a lot of hands and playing it aggressively even more so than a 5-6 handed game.

If he is a weak TAG at three handed play and is only doing this with good hands you can fold here and run him over later.