The three fresh vacancies arose as the tenure of Congress veteran Vayalar Ravi, Indian Union Muslim League leader Abdul Wahab and CPM leader K K Raghesh ended on April 21.
As per the current strength in the legislature the LDF can easily ensure the victory of two candidates.
Two names would be declared by the CPM state secretariat meet to be held on Friday morning.
The nomination form for the election will be accepted from Tuesday.
MPs from Kerala - Abdul Wahab (IUML), K K Ragesh (CPM) and Vayalar Ravi (Congress) will retire on April 21.
EC counsel withdraws statement that Rajya Sabha polls will be held during the present Assembly’s term.
Yechury, who reachedthe southern state to campaign for the Left parties, said the EC's move amounts to 'denial of representation' to Kerala in the Council of States.
Election to three Rajya Sabha seats from Kerala falling vacant next month was to be held on April 12.
The CPM may consider Left sympathiser Cherian Philip and Delhi-based peasant leader Vijoo Krishnan for the two seats on which the LDF can ensure their victory.
Abdul Wahab of the IUML, K K Ragesh of the CPM and Vayalar Ravi of the Congress are retiring on April 21