The company, Big Hit Music, said in a statement that Suga, 28, who returned to South Korea from the United States on Thursday, discovered on Friday that he was infected while in quarantine and after taking a P.C.R.
Suga had no contact with the other members of BTS — RM, Jin, J-Hope, Jimin, V and Jungkook — the statement said.
The news comes a month after another K-pop megastar, Lalisa Manoban, 24, of Blackpink, better known as Lisa, also tested positive for the coronavirus.
Suga, the stage name for the artist Min Yoon-gi, made his debut with BTS in 2013.
In 2018, BTS became the first K-pop group to top the Billboard album chart, with “Love Yourself: Tear.” In September this year, the group gave a speech at the U.N.
Suga has stepped out for solo projects, sometimes performing as Agust D, and as a commercial producer.
Higgins, had the best-selling song in the United States with “Girl of My Dreams,” the first time a song by either artist to hit No.