Guidetti has been rewarded for his outstanding form with Feyenoord with a first call-up to the Sweden squad.
Larsson said: "When I look at what John Guidetti is doing, I'm incredibly proud of him. Seventeen goals in just six months! That is incredible. I know the people of Rotterdam are happy with him."
Guidetti was sent off on the weekend after collecting a second yellow card for taking his shirt off as he celebrated scoring.
"If he had been 25 years of age, I'd be angry, but he is only 19. He'll learn," added Larsson.