Ms Meng said her husband had traveled back to China for work, after a visit to the Nordics, saying: "His job is very busy.we connected every day".
Kim Jong Yang of South Korea will be the acting president of the worldwide criminal police organization until the new president is elected at a meeting in Dubai on 18-21 November, Interpol said.
But the call never came and she said she does not know what happened to her husband, who in recent months appears to have fallen out of favour with the ruling party in Beijing.
Interpol said Saturday it has made a formal request to China for information about the agency's missing president.
Grace Meng, who spoke to reporters for the first time Sunday following Meng Hongwei's disappearance, said four minutes before receiving that message on September 25, he texted her "Wait for my call".
She said she was taking the unusual step of speaking out because she felt a greater responsibility.
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Meng's wife and children had been put under French police protection after they were subject to threats on social media and by telephone, according to France's interior ministry.
French police have been investigating what is officially termed in France a "worrying disappearance". "This matter belongs to the global community", Meng told a press conference.
Although the commission did not detail the allegations against Meng, its mandate is to investigate corruption cases as part of Chinese President Xi Jinping's anti-graft campaign.
About 1.5 million government officials have been punished for wrongdoing in the crackdown, which critics say is an excuse for President Xi to target political enemies and punish disloyalty.
In the role Meng has been entrusted with a number of sensitive portfolios, including heading up the country's counter-terrorism division, which saw him in charge of the response to several major incidents in China's fractious western region of Xinjiang.
Interpol has downplayed the concerns, saying the president has little influence over the organisation's day-to-day operations, which are handled by secretary-general Stock, a German.
Authorities in China and Hong Kong have accused Guo, who resides in the United States, of laundering billions of dollars among other crimes.