The vice president spoke at a news conference in Singapore alongside Prime Minister Lee Hsien Loong, who offered the use of his country's air force to assist with evacuations.
The long-planned trip is now complicated by the chaotic U.S. withdrawal from Afghanistan, which is drawing comparisons to the fall of Saigon in the aftermath of the Vietnam War.
The government had previously said data collected by its widely used app would only be used for contact tracing. The program is seen as a key part of the country's success in managing the coronavirus.
The man had undergone mandatory testing before embarking on the ship. But after the journey was cut short, the man tested negative twice as authorities sought to confirm his status.
The arrangement, originally slated to begin Sunday, would have provided some travelers the ability to bypass a 14-day quarantine period. But new cases in Hong Kong have put the plan on hold.
The Southeast Asian city-state was lauded as a success story when it came to controlling the coronavirus. Now, it's facing an enormous outbreak in the cramped quarters where migrant laborers live.
Singapore reported 1,426 new cases on Monday and now has the highest number of reported cases in Southeast Asia. Most of those recently infected are foreign workers staying in cramped dormitories.
The country, which has won praise for its handling of the pandemic, has adopted strict new measures that could mean months behind bars for folks who fail to stay more than three feet apart.