Singh was among the 10 BJP and two Samajwadi Party candidates who were elected unopposed to the Uttar Pradesh Legislative Council on January 21.
A portrait of Hindutva ideologue Veer Savarkar in the picture gallery of the Uttar Pradesh Legislative Council has sparked a row.
A formal announcement in this regard would be made on Thursday afternoon if there is no withdrawal of nomination, Dubey said.
Polling will be held on January 28 and counting of votes will be done one hour after the completion of polls as per established practice
The Election Commission had on Monday announced that the polls in these constituencies will be held on December 1 and the counting of votes will be taken up on December 3.