Party general secretary Janardan Dwivedi said the lunch programme, which was to happen on June 5 has been postponed and it will now be organised on June 10.
Sources said that the leadership felt that it will not be proper to organise the lunch programme for the MPs just a couple of days after the tragedy.
Munde had died in a road accident in the national capital yesterday.
The lunch programme to be organised for all UPA MPs in Parliament Annexe will be the first occasion where Gandhi will be meeting all of them together after their drubbing in the Lok Sabha polls.