Kaur is a trade union leader and a member of the AITUC general council.
The election will be held on February 4, along with the assembly polls.
The CPI central secretariat appealed to the voters of the constituency to vote for her and send her to the Lok Sabha so that the cause of the downtrodden and the exploited was taken up in all earnestness, CPI general secretary S Sudhakar Reddy said in the statement.
Singh had resigned as parliamentarian, protesting against the "injustice" meted out to people of Punjab following a Supreme Court order on Sutlej-Yamuna Link canal water-sharing agreement.
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