Lots of talk about the refs again on here, but at the end of the day the Mavs were 20 of 44 from 3 and the Suns were 9 of 25 (the Suns were 39-84 and Mavs were 38-850 both had 85 FG's with the Suns making 39 and the Mavs making 38). The FT's were nearly identical at 18 to 19, but the Suns had 17 turnovers to 11.
At the end of the day the cleaner team that hit more than twice as many 3's is almost always going to win the game. That is what happened.