Mohammed has appeared isolated among fellow world leaders at the G20 summit in Argentina, with the exception of a vigorous public handshake from Russia's Vladimir Putin - himself treated as a pariah by some of those present. But the crown prince's reputation has taken a turn after the murder of Khashoggi in Turkey.
Erdogan said the Saudis have refused to help Turkish prosecutors who sought information including the whereabouts of Khashoggi's body and the identities of accomplices said to have supported the visiting Saudi hit squad.
Prince Mohammed is today at the G20 summit in Buenos Aires as the controversy over Khashoggi's killing continues to dominate the West's relations with Saudi Arabia.
Russian Federation and Saudi Arabia have close relations over their joint deal to regulate oil supplies.
But, in an exclamation point-heavy statement before the summit, Trump said it did not matter whether Prince Mohammed knew about Khashoggi's death because Saudi Arabia was important for United States business and for its hostility to Iran.
An official in Macron's office said the exchange captured on video and transcripts circulating on social media "show well the president's firm stance".
In contrast, Mr Putin and the crown prince shared a smiley, enthusiastic greeting at the gathering. World leaders who meet with the Crown Prince should raise these serious allegations. "We might [later], but we had none", President Trump told the press pool.
Prince Mohammed was greeted warmly by Russian President Vladimir Putin.
Trudeau said he told the crown prince that he hoped Badawi, whose wife and children moved to Quebec as refugees and became Canadian citizens earlier this year, would be released from prison soon.
Argentinian President Mauricio Macri's wife Juliana Awada and French President Emmanuel Macron's wife Brigitte laugh during a ceremony at the Casa Rosada Presidential Palace.
Speaking from a Group of 20 summit in Buenos Aires, Pompeo acknowledged that the humanitarian crisis in Yemen - where millions are at risk of starvation - had reached "epic proportions" but said Washington and Riyadh were offering aid.
The killing of Khashoggi, a U.S. resident who wrote for the Washington Post, has emerged as the most serious threat to American-Saudi ties since at least the September 11, 2001 terror attacks.