Wålemark was injured during the training camp in Valencia and will return to his club, Lech Poznan, for rehabilitation on Friday afternoon, the Swedish Football Association says on its website.
At the most recent training camp in September, Wålemark made his first two appearances for the senior national team. He started against Poland.
Sweden will face Bosnia and Herzegovina at home at the national stadium in Solna on Saturday before concluding its Nations League Group B campaign with an away match against Poland on Tuesday.
Before the training camp began, Besfort Zeneli also withdrew due to a minor injury.
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