The 22-year-old, who was given a suspended 16-day prison sentence for causing a traffic accident last week, lost ground to Russia's Alexander Bolshunov at the weekend.
But he won the 1.2km sprint by 0.89s from compatriot Eirik Brandsdal, while Bolshunov failed to progress beyond the quarter-finals.
Imperious Klaebo wins sprint in Drammen
Klaebo leads the overall standings by 31 points with two events remaining, while Sjur Roethe lies a distant third.
The women's competition is even closer, with Norway's Ingvild Flugstad Oestberg top of the standings by only two points from Natalia Nepryaeva.
The Russian closed the gap to Oestberg after finishing third in the sprint while Maiken Caspersen Falla took the victory ahead of Astrid Jacobsen.