AICC general secretary Mukul Wasnik said the roadshow has been postponed due to some "unavoidable reasons", with elaborating.
The joint roadshow of Congress vice-president Gandhi and SP president and Uttar Pradesh Chief Minister Yadav, scheduled for February 11, had earlier been postponed in view of large numbers of pilgrims visiting the temple town on the occasion of Ravidas Jayanti.
The roadshow was later scheduled for tomorrow.
Wasnik said the revised date of the joint roadshow would be finalised soon.
A senior Congress leader said Gandhi would address a public meeting in the Pindra Assembly constituency of Varanasi district on March 2 in favour of Congress-Samajwadi Party alliance candidate Ajay Rai.
Varanasi goes to poll in the last of the seven-phase Assembly election in Uttar Pradesh on March 8.