This was confirmed by Liverpool on its website.
"I think Alex is in a good place because Sweden qualified for the World Cup last night and he will train with the group again for the first time tomorrow," said coach Arne Slot on Wednesday.
"Of course it's his first training with the team after three or four months, but it's good to have him back because we all know who we signed, an incredible striker."
Isak suffered a broken fibula in December. A couple of weeks ago, Slot said he hoped Isak would be able to play, at least for a few minutes, in the Champions League quarter-final against Paris Saint-Germain on April 7.
