He was last seen entering the Saudi consulate in Istanbul on 2 October.
Earlier on Friday, Prince Mohammed met Indian Prime Minister Narendra Modi and told him about plans to scale up investments in India's tech, farm and energy sectors, an Indian official and the Saudi news agency (SPA) said on Friday.
Saudi Arabia has long sought to diversify away from its reliance on the United States and has increasingly stepped up its engagement with China, its largest trading partner with US$42.36 billion in bilateral trade in 2017. Riyadh is now seeking the death penalty for five members of the hit squad in a move that appeared to be aimed at appeasing global outrage over the killing and distancing the killers and their operation from the crown prince.
The Associated Press reported that Trump, who's been publicly skeptical about the CIA's findings, walked by the chummy pair without appearing to acknowledge them.
Video of their meeting shows the two speaking in hushed tones with their heads close together, Mr Macron looking the crown prince in the eye and Prince Mohammed nodding his head and at times smiling.
The Summit marks a return of the crown prince to the worldwide stage after the kingdom came under fire for the killing of journalist Jamal Khashoggi in its Istanbul consulate. The summit and greeting also comes as a Russian-born businessman said a penthouse for Putin was under consideration at the proposed Trump Tower in Moscow.
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. The Prime Minister told bin Salman there needed to "be full transparency about exactly what had happened" following the death of Jamal Khashoggi.
All five Republican senators voted against advancing the bill, which, if passed, would force the USA to limit its support for the devastating Saudi war in Yemen.
The document says Qahtani used the Centre for Studies and Media Affairs at the Royal Court (CSMARC), the court's media department, to organise the murder.
Asked if he had talked to bin Salman on Friday, Trump replied: "We had no discussion".
However, the content of the messages between the two parties is unknown.
Five staff from the centre were involved in the Khashoggi operation, the assessment says.
China also has good relations with Saudi's regional rival, Iran, and has long had to balance its ties between Riyadh and Teheran.