It has recently been reported that Tony Parker has a mild hamstring strain, which he seemed to have suffered in the middle of Game 3 (via ESPN). He's questionable for Game 4, which isn't exactly the best news for San Antonio Spurs' fans.
In fact, it's hard to imagine what a Spurs team without Parker would look like. Ever since he joined the team in 2001, Parker has only played less than 70 games in three of his 12 seasons—four if you include the lock-out shortened 66-game season.
He missed most of those games earlier in his career, when the Spurs looked a lot different than they do right now, and Tim Duncan was still carrying the bulk of the load.
In Game 3, the Spurs won the game because of their role players, not because of Parker. He only went 2-for-5 from the field for just six points, but he did dish out eight assists in just 27 minutes of playing time.
The Spurs are clearly capable of defeating the Heat without Parker, but can they do it for the rest of the series if Parker is unable to play?