The Warriors are listing him as questionable for Monday night's Game 4 matchup with the Portland Trail Blazers.
Iguodala was limited to 18 minutes in Saturday's Game 3 victory in Portland. He went to the locker room in the first quarter—infamously giving the ESPN camera a piece of his mind—and was noticeably hampered after returning to the game.
"He was sore," Warriors coach Steve Kerr told reporters after the Warriors' 110-99 win. "Lower leg, just had some soreness. He's going to get an MRI tomorrow. We didn't want to risk anything and put him back in the game. So, when we took him out mid-third, trainer said that'll be it for him. We'll know more tomorrow."
Iguodala played a pivotal role in the first two games of the series, most notably stripping Damian Lillard on his game-tying three attempt on the Blazers' final possession of Game 2. While he's scored 10 total points through the first three games of the series, Iguodala has been vital to Golden State's defensive efforts.
Iguodala's importance has only been magnified in the absence of Kevin Durant. The Warriors have gone back to their "Strength in Numbers" mantra, and Iguodala helps unlock their potential on both ends of the floor. His ability to handle Lillard and CJ McCollum also makes life easier on Steph Curry.
The Blazers could steal a win at home if Iguodala is out for Game 4.