The Swedish World Cup rider was in good shape after two intermediate times, but went out on an inner ski at the third.
The 31-year-old will therefore not have any results from the fourth World Cup competition in a row, including the last two this spring.
Norwegian Atle Lie McGrath leads after the first run, 17 hundredths ahead of Finnish surprise Eduard Hallberg. The 22-year-old came third in the slalom premiere in Levi last weekend, Finland's first alpine podium since Tanja Poutiainen won in February 2004.
The second run starts at 1:30 p.m.
