Gandhi death sentences commuted
The three were among 26 convicted of playing minor roles in the assassination, but were the only ones left on death row after the others were released or had their sentences commuted earlier.
They denied knowing anything about the plot to kill Mr Gandhi as he was campaigning in May 1991 for a return to the prime ministerial office.
The trio served more than 20 years in a prison in Tamil Nadu. Their lawyers have argued that executing them after such terms would amount to an unconstitutional double punishment.
The court today commuted the sentences to life in prison.