The Turkish government has also told the Trump administration that it possesses audio recordings of what occurred inside the consulate that day - evidence that US officials said supports the conclusion that Khashoggi was interrogated, tortured and then murdered. The program takes guests on excursions with Times correspondents and other experts.
Instead, the disappearance of Saudi journalist Jamal Khashoggi has led to an exodus of worldwide A-listers from what is called "Davos in the Desert", potentially undermining the event. "All affected passengers will have their tour costs refunded in full".
Turkish officials have said Khashoggi was murdered inside the consulate, where he went to get documents for his planned marriage.
The journalist had given his phones to his fiancee before entering the consulate.
Turkish authorities have an audio recording which indicates that missing Saudi journalist Jamal Khashoggi was killed in the Saudi consulate in Istanbul, a Turkish official has told Al Jazeera.
But the most noticeable effect felt by Saudi businesses came after Donald Trump's warning on Sunday.
The Saudi stock market fell as much as 7 percent in early trade on Sunday, one of the first signs of economic pain Riyadh could suffer over the affair. The kingdom has called such allegations "baseless" but has not offered any evidence Khashoggi ever left the consulate.
"He said that they are working closely with Turkey to find answer", Mr. Trump wrote.
A column published by the general manager of the Saudi-owned Al-Arabiya satellite news network suggested Saudi Arabia could use its oil production as a weapon and Saudi arms purchases from the USA and other trade could also be at risk.
Saudi stocks have been hit, but made a partial comeback Monday after days of heavy losses with the Tadawul All-Shares Index (TASI) rising 1.8 percent two hours after opening.
Prince Mohammed has aggressively pitched the kingdom as a destination for foreign investment.
Business barons including British billionaire Richard Branson and Uber CEO Dara Khosrowshahi, as well as media powerhouses like Bloomberg and CNN, have pulled out of next week's Future Investment Initiative (FII) in Riyadh.
Khashoggi was last seen entering the consulate on October 2nd, his fiancee and friends have said. The kingdom has poured $US100 billion into the firm's tech investing.
The Saudi Embassy in Washington later tweeted what it called a clarification, thanking countries including the United States "for refraining from jumping to conclusions" over the case.
Khashoggi was a critic of the regime in effect led by the Bin Salman since his father appointed him crown prince in June 2017.