In power since 1994, he faced a wave of protests last year, which some athletes joined.
A number of agencies were in contact with the sprinter, including the United Nations High Commissioner for Refugees.
In a brewing diplomatic incident, it was unclear where Tsimanouskaya would end up with both Poland and the Czech Republic publicly offering her assistance.
"She has assured us she is safe and secure. We are talking again to her this morning to understand what the next steps will be," Mr Adams said.
"We need to listen to her, find out what she wants and support her in her decision."
Tsimanouskaya, who was due to race in the 200-metre heats at the Olympic Stadium on Monday, had her Games cut short when she said she was taken to the airport to board a Turkish Airlines flight.
She told a Reuters reporter via Telegram that the Belarusian head coach had turned up at her room on Sunday at the athletes village and told her she had to leave.
"The head coach came over to me and said there had been an order from above to remove me," she wrote in the message. "At 5 (pm) they came my room and told me to pack and they took me to the airport."
But she refused to board the flight, telling Reuters: "I will not return to Belarus."
The Belarusian Olympic Committee said in a statement coaches had decided to withdraw Tsimanouskaya from the Games on doctors' advice about her "emotional, psychological state".
Belarus athletics head coach Yuri Moisevich told state television he "could see there was something wrong with her ... she either secluded herself or didn't want to talk".
Belarus politician and human rights activist Sviatlana Tsikhanouskaya, who ran in the 2020 Belarusian presidential election as the main opposition candidate, tweeted that Tsimanouskaya "has a right to international protection & to continue participation in the Olympics".
Mr Adams said the IOC would continue conversations with Tsimanouskaya on Monday and the Olympics governing body had asked for a full report from the Belarus' Olympic committee.
In response to a number of questions by journalists about what the IOC would do to ensure other athletes in the village were protected, the IOC spokesperson said they were still collecting details about what exactly occurred.
He said the IOC had taken a number of actions against Belarus' Olympic Committee in the run up to the Games following nationwide protests in the country.
With SBS News