Even a leader has tested positive.
Four people in the squad are thus in quarantine after Karl Wallinius tested positive.
Lucas Pellas has a close relative who is infected.
"We have taken all necessary measures and restrictions to minimize the risk of spread," said doctor Daniel Jerrhag to the national team's website.
The team will be tested regularly and will not have any collective training on Monday.
The players will also not meet anyone other than their roommates until Tuesday night at the earliest.
"Even though there are ten days left until the European Championship premiere, this is not an optimal situation for us, we would rather have trained handball together.
We get to do the best we can of the situation and hope that we can soon train as planned ", says national team captain Glenn Solberg.
He has chosen to call in three new players for the week: left winger Emil Mellegård, right winger Andreas Lang and goalkeeper Fabian Norsten.
In addition to the corona-affected players, there is no Lukas Sandell who became a father on New Year's Eve.
It is unclear when he will join the EC squad.
Sweden will face the Netherlands in two international matches, on Thursday and on Saturday, in Alingsås.
On January 11, the team travels to Bratislava, where the European Championship premiere against Bosnia and Herzegovina will be played on January 13.