The Knicks made the announcement Monday afternoon. It was unclear when Chandler will be back with the team, but his absence is expected to be short-term.
The Knicks' next game is Wednesday at Boston.
New York (24-40) has won three straight and enters play Monday 3½ games behind Atlanta for the eighth and final playoff spot in the Eastern Conference.
Chandler missed 20 games this season due to a fractured bone in his right leg and another four in January due to illness. The Knicks are 10-14 without him.