The Snohomish County medical examiner's office said it was identifying the three bodies most recently discovered and notifying families. The sheriff's office said it has removed one name from the missing list, which previously stood at seven.
Officials didn't say whether one of the most recently recovered bodies led to the change in the missing list.
One body was found Monday and two were found Tuesday in the southeast corner of the debris field where the U.S. Army Corps of Engineers has erected a berm in the past week, said Koshare Eagle, a spokeswoman for the incident management team.
The 3,000-foot-long berm, made of 20,000 tons of rock, gravel and dirt, acts like a levee and allowed standing water to be pumped back into the North Fork of the Stillaguamish River so searchers could enter the area, the corps said.
Searching the debris with dogs and recovering bodies continues to be the main job after the March 22 landslide buried dozens of homes in the community about 55 miles northeast of Seattle.
Meanwhile, engineers are using GPS to map the area as the state Transportation Department makes plans to clear a mile-long stretch of highway that was covered with mud and trees up to 25 feet deep.
The slide blocks the direct route between Interstate 5 and the nearby town of Darrington. The Transportation Department held meetings in Darrington and Oso to talk with residents about the highway. A third meeting was scheduled for Wednesday evening in Arlington.
Transportation officials have said it might take one to three months to clear the highway, but it may be fall before repairs are made and the highway reopens.