The left-arm quick has featured in 38 T20s and has taken 44 wickets with a bowling average of 20.06.
Wanindu Hasaranga has been one of the brightest sparks in Sri Lanka's white-ball teams, making his presence felt in the recently concluded T20I series against India.
Ahead of the resumption of IPL 2021, RCB announced changes to the squad as the team gears up to battle it out in the UAE this September.