The forecasts for Asean in 2016 and 2017 stayed unchanged from the April World Economic Outlook (WEO), at 4.8 per cent and 5.1 per cent, respectively.
Asean-5 comprises Indonesia, Malaysia, the Philippines, Thailand and Vietnam.
The updated WEO was released in Washington on Tuesday night. It revised down the global economic growth forecasts in 2016-2017 by 0.1 percentage points to 3.1 per cent and 3.4 per cent, respectively. Prospects remained diverse across emerging market and developing economies, the IMF noted.