Nepal's crucial parliamentary debate to decide the future of the 238-year-old monarchy was on Sunday postponed till Tuesday to allow the coalition Government and the Maoists to hammer out an agreement over the issue.During the brief House proceedings on Sunday, Speaker Subhas Nembang announced that the next session to deliberate on the Maoist proposal will be held on Tuesday.Earlier, a meeting of the parliamentary affairs consultation committee on Sunday morning unanimously agreed to extend the deadline for registering amendment proposal to the Maoists motion to abolish the monarchy and establish a proportional electoral system.