Wallmark didn't receive a qualifying offer from Florida, which means he'll become an unrestricted free agent Wednesday, CapFriendly reports.
Wallmark secured a one-year contract from CSKA Moscow (KHL) on Tuesday.
Wallmark will be promoted to the active roster and play Thursday against Tampa Bay, David Dwork of Local 10 Miami reports.
Wallmark was assigned to the taxi squad Tuesday, David Dwork of Local 10 Miami reports.
Wallmark was traded to Florida along with Lucas Carlsson in exchange for Brett Connolly, Riley Stillman, Henrik Borgstrom and a seventh-round pick on Thursday, Pierre LeBrun of The Athletic reports.
Wallmark was reassigned to Chicago's taxi squad Tuesday.
Wallmark was placed on waivers by the Blackhawks on Monday, Sportsnet's Chris Johnston reports.
Wallmark was activated to the active roster and is expected to play Monday against Detroit, Charlie Roumeliotis of NBC Sports Chicago reports.
Wallmark was removed from the NHL's COVID-19 protocols list Wednesday.
Wallmark has been added to the NHL's COVID-19 protocol list, Ben Pope of the Chicago Sun-Times reports.