The brief exchange of views came ahead of the first trilateral meeting between Modi, Trump and the Japanese Prime Minister Shinzo Abe later Friday.
According to a picture tweeted by External Affairs Ministry Spokesperson Raveesh Kumar, Modi was seen clasping the hand of Trump and talking to the US president.
"Catching up with other #G20 leaders from Russia, Italy and UK at the Leaders' Lounge," Kumar tweeted, referring to prime minister's interactions with President Putin, Italian Prime Minister Giuseppe Conte and British Prime Minister May.
Later, Modi joined other world leaders for a 'G-20 Argentina Family' photo.
"PM @narendramodi joins the world leaders for #G20Argentina Family Photo," Kumar tweeted.
(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)