Thailand said on Tuesday it was delaying the meeting until March due to its ongoing turmoil, which saw protesters occupy both of the capital's airports until Wednesday.
'A postponement would be favourable given the present circumstances,' Philippines President Gloria Arroyo's spokeswoman Lorelei Fajardo told reporters.
'It will give Thailand more time to resolve its political crisis and give the members more time to prepare,' she added.
The Thai announcement has so far drawn mixed public reactions from Asean, which groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.
Cambodia said on Wednesday it regretted that the meeting of Asean leaders could not be held this month as previously scheduled.
But Ms Fajardo insisted that 'the members and officials agree that a postponement will not affect Asean work plans negatively.'
She said the 'safety of participants must also be ensured.'
Thailand's constitutional court on Tuesday disbanded the ruling party and banned Prime Minister Somchai Wongsawat from politics for five years in a vote fraud case.
Malaysia earlier on Wednesday raised doubts over whether Thailand would be able to host the Asean summit at all.
Singapore urged that it be held earlier than March, preferably in January, and said that consideration should be given to staging the summit at the Jakarta-based Asean secretariat.
In 2006, the Philippines rescheduled a December summit for the following month after two powerful storms threatened to batter its central region, although some sources said it was linked to security threats. -- AFP