The third season of the Indian Malayalam-language reality television game show Bigg Boss premiered on 14 February 2021. It is produced by Endemol Shine India under the control of Banijay and broadcast on Asianet with Mohanlal as the host. The show follows selected contestants who are isolated from the outside world for 112 days in a custom-built house.

Bigg Boss, a Malayalam-language television reality show in India, is part of the Bigg Boss franchise produced by Endemol Shine India. It airs on Asianet and streams on Disney+ Hotstar. Inspired by the Dutch reality show Big Brother. Launched as part of Asianet's 25th-anniversary celebrations, the show has been hosted by Mohanlal since its inception.