He is expected to start the day with a bilateral meeting with Canadian counterpart Justin Trudeau, which would be Modi's first meeting with Trudeau after he was recently elected as Canada's Prime Minister.
This would be followed by back-to-back meetings with British Prime Minister David Cameron and Argentinian President Mauricio Macri.
Cameron is meeting Modi at a time when he is facing the prospect of job loss to some 20,000 people after India's Tata Steel decided to sell its loss-making UK businesses.
The sessions are on national actions to enhance nuclear security, international and institutional actions to strengthen nuclear security and scenario-based policy discussion.
"The Prime Minister will be outlining India's roadmap, India's vision and the measures India has taken to ensure nuclear safety and security," External Affairs Ministry spokesman Vikas Swarup told reporters.
Later, Modi is scheduled to meet Switzerland President Johann N Schneider-Ammann.
He would conclude his two-day trip to Washington by meeting his close friend and Japanese Prime Minister Shinzo Abe.
Yesterday, the Prime Minister had a bilateral meeting with his New Zealand counterpart John Key.
At the White House dinner hosted by Obama for visiting leaders, Modi in an intervention said that without prevention and prosecution of acts of terrorism, there is no deterrence against nuclear terrorism.
"Interacted with world leaders at the NSS dinner at the White House. Shared my thoughts on the threat of nuclear terrorism," Modi tweeted late in the night on his return from dinner.
