Bambawale was told about the cancellation just half an hour before the event.
Yogendra Yadav said he earlier tried to warn AAP that they were heading in the wrong direction.
The all-party delegation will assess the situation in Kashmir and chalk out a future strategy.
The locals in Deoria district left Rahul's rally with newly bought khats
To encourage and motivate the youths, an interactive session was held during the event.
The appalling picture of water supply in the capital had last year prompted the tribunal to seek the response of the city government in the matter.