All eyes were on Saudi Crown Prince Mohammed bin Salman at the Group of 20 summit on Friday as he made his first major overseas appearance since the killing of a dissident journalist in his country's consulate in Istanbul.
In contrast, Mr Putin and the crown prince shared a smiley, enthusiastic greeting at the gathering.
World leaders including a beaming Vladimir Putin welcomed Saudi Arabia's Crown Prince Mohammed bin Salman on Friday at the G20 summit. But it received wide traction on social media, with Macron telling the prince, "You never listen to me", to which Prince Mohammed replies, "I will listen, of course".
The prime minister's aides refused to say whether she would ask the crown prince if he was directly involved in the murder of Jamal Khashoggi.
"It only wasn't set up", the president told reporters Thursday. But with the agency not publicly stating so, Trump has attempted to deflect blame away from the crown prince.
The Saudi Gazette newspaper posted a video of the meeting online showing the two speaking in hushed tones with their heads close together.
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Mr Macron's office said the meeting with Mohammed bin Salman was justified because European nations wanted to send a united message about the need for probity in the investigation and were not going to sidestep an opportunity to reinforce that message during the G20.
Macron continued the conversation, saying he is "a man of my word".
After repeated denials of any knowledge about Khashoggi's disappearance, Saudi Arabia finally admitted the 59-year-old had been murdered at the mission in a "rogue" operation.
There has been widespread condemnation and public outrage over attacks on sites such as school bus and hospitals, where Yemeni civilians, including children, have died.
Also the Saudi Crown Prince met at his residence in Buenos Aires the Prime Minister of India, Narendra Modi.
The U.S. president also didn't pay much attention to Russian President Vladimir Putin, who found himself snubbed for the second time in a month after Trump used Twitter to torpedo their planned meeting in Argentina.
A White House official confirmed the two exchanged pleasantries during a leaders' session.
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