Tannishtha's Canadian film Siddharth was in official selection at the 70th Venice Film Festival and the 2013 Toronto International Film Festival. She is the only Indian actress whose films have been selected in three of the major international film festivals in the same year. Her other notable projects are Parched directed by Leena Yadav which opened in Toronto, Australian romantic comedy Unindian with Brett Lee Island City which won the best debut director( Ruchika Oberoi) in Venice and Garth Davies's film LION co-starring Nicole Kidman and Dev Patel. Her film Angry Indian Goddesses received acclaim in Toronto and Rome international film festivals. In March 2016 Tannishtha was given a special award in a ceremony held at the BAFTA for her contribution to Asian Cinema. She won the best actress for the film Parched along with three other actresses in Festival 2 Valenciennes and the Indian Film Festival of Los Angeles 2016. She was the president of the jury of the prestigious MOOOV film festival in Belgium in 2016. She won the best actress at the Pune International Film Festival 2017 for her role in Dr. Rakhmabai. In 2019 Tannishtha made her directorial Debut Roam Rome Mein which had its World premier at Busan International Film Festival where she won the Asia Star Award.
