Vice-President Venkaiah Naidu and Prime Minister Narendra Modi were also present on the occasion.
Prime Minister Modi will address the plenary session of the India-ASEAN commemorative summit later today.
The focus of the summit will be counter-terrorism, security, trade and connectivity.
On Friday, the ASEAN leaders will be chief guests at the 69th Republic Day parade. This is the first time leaders of so many countries are attending the event together.
President Ram Nath Kovind will host a banquet in honour of ASEAN leaders. It will be followed by a Leader's Retreat.
Prior to the plenary session, Prime Minister Modi has been holding bilateral meetings with ASEAN leaders. (ANI)