That news comes on the same day Adam Schefter of ESPN reported New Orleans had a "handful of offensive coaches" test positive for the coronavirus.
It's not known whether Thomas tested positive for the coronavirus or was deemed to be a close contact.
The Saints placed Thomas on the physically unable to perform list Aug. 31, meaning that he would sit out the first five regular-season games. He is eligible to return from the PUP list for Week 7 against the Seattle Seahawks on Oct. 25.
As ESPN's Mike Triplett noted, the PUP placement stems from a left ankle issue that has lingered since Week 1 of the 2020 season. Thomas had surgery on the ankle in June.
The 28-year-old dominated the NFL over his first four seasons, averaging 118 catches, 1,378 yards and eight touchdowns per year from 2016-19.
He led the NFL with 125 receptions in 2018 before setting a single-season league record with 147 catches in 2019.
The second-round draft pick out of Ohio State has earned three Pro Bowl nods, two All-Pro honors and the 2019 Associated Press Offensive Player of the Year award.
Thomas is coming off a 2020 campaign in which he made seven appearances, hauling in 40 receptions for 438 yards.