The Canadian Olympic forward, a major component of the squad, left Monday night's game against the Los Angeles Kings after spraining his left ankle in the second period.
A Ducks spokesman told ESPN.com that Getzlaf was scheduled to undergo an MRI on Tuesday afternoon.
"At this point there's not much we can do but wait for the [MRI] results later today," Team Canada executive director Steve Yzerman told ESPN.com Tuesday.
The Anaheim playmaker is scheduled to suit up for Canada at his first Olympics next week, but he left the Honda Center on Monday night on crutches with his foot in a protective boot.
"Hopefully, he won't be out too long," said defenseman Scott Niedermayer, the captain of the Ducks and Team Canada. "I don't have to say what he means to this team and what he does for us, so hopefully it's not bad."
Getzlaf scored his 15th goal earlier in the game before spraining his ankle and hobbling to the bench, apparently getting hurt behind the play. He didn't return to action.
X-rays on Getzlaf's ankle revealed no broken bones.
Getzlaf has 57 points in 55 games for the Ducks, earning his Olympic selection alongside Canadian teammates Niedermayer and Corey Perry.
"I haven't really thought about [the Olympics], to be honest," Niedermayer said. "I know he would love to play, but we don't know how badly hurt he is right now. Hopefully he's in our lineup in two nights [against Edmonton]."
Pierre LeBrun covers the NHL for ESPN.com. Information from The Associated Press contributed to this report.