The Trinamool Congress (TMC) leaders won't attend the all-party meet in Delhi on July 20 owing to a pre-scheduled meeting of the MPs in Kolkata.
The meeting in Kolkata has been called by party supremo Mamata Banerjee.
The TMC MPs will, however, be present at the Martyr's Day rally in Kolkata on July 21and attend the Parliament from July 22.