Barbosa has Grade 2 sprain of the medial collateral ligament in his left knee and is out two to three weeks, the team said Monday.
But while the diagnosis received a sigh of relief from the team, it offered little solace for Barbosa who believes the injury could have been avoided.
He was injured Saturday when Spurs guard Manu Ginobili fell into him. He did return to play in the second half of that game.
"Ginobili always likes to flop," Barbosa told The Arizona Republic. "Nobody even touched him.
"He jost flopped. That's why I feel sad to hurt myself like that," he added. "I wish I could have hurt myself in another way."
Suns coach Mike D'Antoni told the paper Ginobili "got tangled up a little bit" with Raja Bell when he stumbled backward, and "just to make his point, he was falling down."
"It was an accident," D'Antoni told the Republic.
Ginobili has been accused in the past of overacting to draw fouls; Suns forward Shawn Marion even joked about practicing his own acting skills during last season's Western Conference finals, the paper reported.
Barbosa was averaging 15.7 points in 25.8 minutes this season.