The move comes after Singh accused party supremo Mulayam Singh's second wife of being part of a conspiracy against Uttar Pradesh Chief Minister Akhilesh Yadav.
Singh, who is a member of the legislative council, also attacked state Samajwadi Party chief and Mulayam Singh's brother Shivpal Yadav for being the 'political front' of the Chief Minister's stepmother.
The decision came after Mulayam met senior leaders earlier today to find ways to end the raging infighting which is threatening to take the party to the verge of a split.
The crisis in the party escalated yesterday when Akhilesh skipped the crucial party meeting convened by state unit chief and his uncle Shivpal Singh Yadav.
Akhilesh, however, met the members separately at his residence after their meeting ended with Shivpal.
Meanwhile, party top brass is likely to meet CM Akhilesh later in the day.