The United States and Britain have warned that failure to go ahead with the re-scheduled ballot will damage the Indian Ocean atoll nation and its fragile tourism-dependent economy.
Western and Indian diplomats have come to view the annulment of a first round of elections that took place on September 7 and police action to prevent a second vote on October 19 as deliberate moves to block opposition leader Mohamed Nasheed.
The Maldives' 2008 constitution, which ended 30 years of one-party rule by former autocrat Maumoon Abdul Gayoom, stipulates that a new president must be elected by November 11.
Nasheed swept to victory in the first round of elections on September 7 with 45 per cent of the vote and was the front-runner in a second round run-off against Gayoom's half-brother Abdulla Yameen scheduled three weeks later but halted by police action.
Nasheed, the country's first elected president, resigned in February 2012 following demonstrations and a mutiny by security forces that he denounced as a coup.
The nation of 350,000 Sunni Muslims will face a power vacuum if no one is chosen to replace President Mohamed Waheed, who took over in 2012.