Carlsson signed a three-year contract with Vaxjo HC of the Swedish Hockey League on Friday.
Carlsson will become an unrestricted free agent Saturday because the Capitals didn't extend him a qualifying offer, Matt Weyrich of NBC Sports Washington reports.
Carlsson was returned to AHL Hershey on Thursday.
Carlsson was recalled from AHL Hershey on Friday, Tarik El-Bashir of The Athletic reports.
The Capitals placed Carlsson on waivers Sunday, per CapFriendly.
Carlsson signed a one-year, two-way contract with the Capitals on Wednesday.
Carlsson wasn't qualified by the Blue Jackets, so he'll hit the market as an unrestricted free agent Wednesday, Mark Scheig of The Hockey Writers reports.
Carlsson scored his second goal of the season in Thursday's win over the Panthers.
Carlsson has been in the lineup just once in the last 10 games.
Carlsson (COVID-19 protocols) was activated from the league's COVID-19 protocols Monday.