On television, he debuted in a popular serial "Wah! Janaab" with Kiran Juneja. It was based on Lucknow Urdu culture. Suman's TV career included popular shows like Dekh Bhai Dekh, Reporter, Kabhi Idhar Kabhi Udhar, 'Chote Babu, Andaz, Amar Prem 'Aaha', Vilayati Babu, Movers n Shakers, Simply Shekhar and Carry On Shekhar. The last three were primarily modelled on and adapted from The Tonight Show with Jay Leno. He hosted Film Deewane The Great Indian Comedy Show on Star One until February 2006 and appeared in some episodes of Dial One Aur Jeeto on Sahara TV. He also did quiz shows including Nilaam Ghar on Zee TV and He-Man on Star One. He also hosted the Poll Khol show on STAR News for five years, which was a satire on Indian politics. In 2015, he has hosted similar type of show named Abki Bari Shekhar Bihari on Aaj Tak.
His talk shows were Movers and Shakers on the Sony Entertainment Network and Simply Shekar on Zee Television. They were primarily modeled on and adapted from The Tonight Show with Jay Leno. He until February 2006 hosted The Great Indian Comedy Show on Star One for sometime plus doing some episodes for Dial One aur Jeeto on Sahara TV. In the past also he has done some quiz shows like Bid Bid Boom on Zee Television and He-Man on Star One. He also hosts a show on Star News, Poll Khol (which ambiguously means 'uncovering' in Hindi) in which he speculates humorously over the current political scenario in India.
He returned to Television in 1993 in Dekh Bhai Dekh, as Sameer, and also affectionately called "Chachu" (Hindi translation: father's younger brother) by the kids. A very successful comedy show, Dekh Bhai Dekh was aired on Doordarshan TV channel in the early 1990s. Almost simultaneously, he also starred in another TV serial Reporter.