The loss, coupled with the Lakers’ victory at Portland later on Wednesday, meant a 12-season streak of playoff trips for the Mavericks (38-40) officially ended.
Goran Dragic led the Suns with 21 points and 13 assists, while Luis Scola had 11 points and a season-high 15 rebounds.
Shawn Marion led the Mavericks with 22 points and nine rebounds. Dirk Nowitzki scored 21 points and Vince Carter had 18.
CLIPPERS 111, TIMBERWOLVES 95
In Los Angeles, Blake Griffin and Chris Paul led seven players in double figures with 19 points apiece, as Los Angeles beat Minnesota for their franchise-record 31st home win of the season.
Paul added 11 assists and Willie Green had 15 points in breaking the old mark of 30 wins by the 1974-1975 team, when they were known as the Buffalo Braves. The Clippers improved to 31-9 at home, three days after clinching their first Pacific Division title in franchise history.
Nikola Pekovic scored 20 points, while Derrick Williams had 13 points and 10 rebounds for the Timberwolves, who got swept 4-0 by the Clippers for the first time since 1992-1993.
HAWKS 124, 76ERS 101
In Philadelphia, Josh Smith had 28 points and 12 rebounds, while John Jenkins added 21 points as Atlanta blitzed Philadelphia.
Mike Scott contributed 17, Al Horford had 16 and Jeff Teague 13 for the Hawks, who snapped a three-game losing streak and improved to 43-36.
The Hawks pulled into a tie with the Chicago Bulls for fifth place in the Eastern Conference playoff chase.
The Hawks recently clinched their sixth straight playoff berth, but were coming off losses to the Sixers, the New York Knicks and San Antonio.
In other NBA action, it was:
‧ Magic 113, Bucks 103, OT
‧ Pistons 111, Cavaliers 104
‧ Kings 121, Hornets 110