Soderstrom will not be handed a qualifying offer by the Islanders, Arthur Staple of The Athletic reports.
Soderstrom signed a one-year deal with Finnish club Assat on Friday, Finnish outlet Satakunnan Kansa reports.
Soderstrom (shoulder) was in attendance for the Islanders' prospect camp Tuesday, Andrew Gross of Newsday reports.
Islanders GM Lou Lamoriello said Soderstrom (shoulder) is currently in Sweden working with a medical trainer, adding that there's no timeline for the goalie's return to the NHL club, Arthur Staple of The Athletic reports.
Soderstrom -- who suffered a season-ending shoulder injury last year -- may not be ready in time for Isles' training camp, Andrew Gross of Newsday reports.
Soderstrom is expected to make his professional debut with Bridgeport of the AHL next season, Newsday reports.
Soderstrom has undergone shoulder surgery, Arthur Staple of Newsday reports.
Soderstrom was loaned to HV 71 Jonkoping of the Swedish Hockey League on Friday.
Soderstrom signed a three-year, entry-level contract with the Islanders on Thursday, Arthur Staple of Newsday reports.