"MIM party has decided to support TRS party candidates in Rajya Sabha elections," he said on a social networking site.
Elections would be held on March 23 to fill the three vacancies.
In the 119-member Legislative Assembly, the party-wise strength is: TRS-82, INC-19, MIM-7, BJP-5, TDP-3, Independent-1, CPI(M)-1 and CPI-1.
The MIM's support would boost the chances of TRS to win the third seat also as the main opposition Congress is considering fielding its nominee in the poll.