He was to appear on the dance reality show to promote his forthcoming film "Kai Po Che!", releasing February 22, and hurt himself while doing a tricky move.
A source close to the team revealed: "Sushant was in excruciating pain and was rushed to the Kokilaben Dhirubhai Ambani Hospital. The X-ray results showed a ligament tear. Though discharged from the hospital, he needs to be under doctors observation for 24 hours."
Director Abhishek Kapoor's film stars Sushant, Rajkumar Yadav and Amit Sadh and all three were to take part in the reality dance show as guest judges and Sushant was to perform too.
The shooting was to take place on Tuesday. However, now looking at Sushant's condition, the creative team will take a call on how to go ahead with the plans.
A big screen adaptation of Chetan Bhagat's "3 Mistakes of My Life", "Kai Po Che!" will have its premiere at the Berlin International Film Festival on February 13 and after that it will hit the screens February 22.