Even U.S. President Donald Trump didn't acknowledge the pair.
Meanwhile, bin Salman talked with world leaders as accusations swirled about the gruesome killing of Khashoggi, who was tortured before he died.
"We suggest renaming the street address of the Saudi Embassy into Jamal Khashoggi Way to be a daily reminder to Saudi officials" that such killings are "totally unacceptable and as an expression of Washington's unstinting support for freedom of the press", the petition states.
What is the G20 summit and why does it matter?
About 22,000 police officers and other security forces were guarding the leaders during the two-day summit that began on Friday. Saudi officials have blamed the killing on rogue agents and denied the crown prince had knowledge of the operation.
While some world leaders distanced themselves from the Saudi crown prince accused of ordering the assassination of a journalist, and from Russian President Vladimir Putin.
British Prime Minister Theresa May has also promised to push the Crown Prince on both the journalist's murder and the war in Yemen. The White House was said to prevent CIA Director Gina Haspel from attending a closed-door briefing on the killing this week with senators, prompting more criticism.
In the audio of the conversation, it's possible to make out the prince saying "Don't worry", to which Macron responds: "I am worried".
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He said he would monitor the two newborns for the next 18 years and hoped they would support continued monitoring thereafter. He's announcement, which has not been verified, sparked an global outcry about the ethics and safety of such research.
'The Prime Minister stressed the importance of ensuring that those responsible for the appalling murder of Jamal Khashoggi are held to account, and that Saudi Arabia takes action to build confidence that such a deplorable incident could not happen again, ' May's office said in a readout of a meeting with Prince Mohammed.
The US president cancelled a formal sit-down with Mr Putin at the summit in Argentina over Moscow's seizure of Ukrainian vessels. (AP Photo/Gustavo Garello) Soldiers patrol outside the Costa Salguero Center (AP Photo/Natacha Pisarenko) China President Xi Jinping and first lady Peng Liyuan arrive at the Ministro Pistarini global airport in Buenos Aires ahead of the summit on Thursday, Nov. 29, 2018.
He also met with South Korean President Moon Jae-in, and Mexico's President Enrique Pena Nieto.
Mr Trump has branded the United States-Mexico-Canada Agreement, or USMCA, "the biggest trade deal in the United States history".
Nintendo Switch Top-Selling Console Online During 5-Day Thanksgiving Weekend
Lifetime sales of Nintendo Switch , which is entering only its second holiday season, have reached more than 8.2 million units. As far as lifetime sales are concerned, the Switch has reached more than 8.2 million sales since its launch past year .