He was 67, a bachelor and is survived by three sisters and four brothers.
Deb Sarkar first became MLA from the Khowai constituency in 1983 and won from the seat for consecutive six times.
A former leader of the Student Federation of India, he joined CPI-M in 1976.
Deb Sarkar was a state committee member of the Tripura CPI(M) and Chief Whip of the party in the Assembly.