The 21-year-old Norwegian played the entire match as Dortmund went down 4-0 to Ajax in the Champions league on Wednesday.
“Time to focus on my injury. I will be back stronger,” tweeted Haaland alongside a photo of himself clapping the public.
Haaland’s absence is a blow for Dortmund, currently second in the Bundesliga, one point off leaders Bayern Munich.
The Norwegian has already scored nine goals this season, sitting atop the league’s goal-scoring charts alongside Bayern rival Robert Lewandowski.