Trump to visit Philippines, Vietnam in November for regional summits: Pence

"President Trump, for instance, when President Duterte called him up to congratulate him, had already indicated that he was coming in November", Paynor said in a press conference in Malacañang.

At least 52 meetings, including an annual gathering of ASEAN foreign ministers on central Boracay Island in February, have been held without any incident, Cuy said.

Paynor is also the director-general for operations of the ASEAN 2017 National Organizing Council.

In early December, Duterte phoned Trump to congratulate the latter on his election victory.

Sultan Bolkiah and Widodo will be the second and third foreign leaders, respectively, who will pay the Philippines a visit during the Duterte administration.

The series of activities for the ASEAN Summit involve a total of 137 meetings, two summits, 17 ministerial meetings, 42 senior officials' meetings and 76 meetings of technical working groups.

ASEAN, which is marking its golden anniversary this August, groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.

"Trump could skip much of the plenary (leaders do occasionally duck out to take bathroom breaks or hold the odd bilateral) but not without offending his hosts and indicating the very lack of engagement we'd hoped to avoid", he added.

Paynor said that with "Multilateral meetings of this sort, you usually expect 100% attendance. And numerous leaders who do not attend do so because they have internal issues which prevent them from coming", Paynor said.

Leaders from New Zealand, South Korea, the US, Japan, Australia, China are expected at the meeting, along with representatives from ASEAN's 9 other member states.

The DFA will host the 30th ASEAN Summit and Related Meetings from April 26 to 29.

The Indonesian president is expected to attend the launch of the Davao-General Santos-Bitung roll-on, roll-off route in Davao City on April 30.

Department of Foreign Affairs spokesman Robespierre Bolivar said all foreign delegates to the meeting, which would focus on a free trade agreement between ASEAN and Hong Kong, have confirmed their attendance.

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