Hes having a rough stretch but part of the reason his percentage is that low are the 2-3 heaves each game at the end of quarters as time expires. Id like to see someone run his 3p% without those shots. Probably still bad but I bet it wouldnt be nearly as bad
BasketballReference does this. He's got 9 heaves on the season (not 2-3 per game). That brings his percentage from .277 to .285. So no, you're wrong, and his percentage is nearly as bad.
http://www.basketball-reference.com/players/s/smartma01.html
Yeah, that's a BS number. To say Smart only has 9 "heaves" on the season is ridiculous; he literally had three alone the other night in the Bucks game.
I'm guessing you're getting the 9 number from "back court shots," as NBA.com labels it, but that is not completely representative of what people consider "heaves." He's had probably three times as many as the "back court heaves" from the deep three territory inside of halfcourt.
2-3 per game is hyperbole, though he legitimately had 3 the other night against Milwaukee, but it wouldn't surprise me if he averaged more than 1 per game. And that's not even counting the other times when he shoots late in the shot clock from the regular distance threes either.