Authorities are working to determine if recently discovered debris on Mozambique and Réunion Island are linked to the missing Malaysia Airlines flight.
The third piece was found on France's Réunion Island during the last two weeks, Malaysia's transport minister said.
Experts will examine the debris found two weeks ago in the African nation for possible links to the missing aircraft.
The Malaysian prime minister's disclosure of an end date later this year came after relatives of passengers called for a recovery effort to continue.
The search is still on for a passenger plane that disappeared in March 2014. Here's everything we know about the investigation.
Malaysia Airlines Flight MH370 vanished March 8, 2014, and there's little evidence to explain why. Here are the top conspiracy theories.
Nearly three-quarters of over 46,000 square miles of seafloor have been searched, and hopes are high that the plane could be found soon.
Relatives of those aboard the ill-fated Malaysia Airlines Flight MH370 are moving to file suits against the carrier and the Kuala Lumpur government as a two-year deadline for legal action nears.
The debris, possibly from a Boeing 777 plane, was found just days before the second anniversary of Flight MH370’s disappearance.
The fruitless search for the plane, which went missing in March 2014, has dragged on for two years and is expected to end in June.
Next week, U.S. scientists and engineers will join Chinese, Dutch and Australian investigators in seeking the remains of a Malaysian passenger jet.
An Australian official’s acknowledgment of the possibility came a day after it was announced a Chinese sonar-equipped vessel would join the search for the plane.
It was the second time in a week that debris was determined not to have been from an airliner that disappeared in March 2014.
The search and recovery operation for the missing Malaysian Airlines jet, led by Australia, is likely to end in June this year.
The news comes as Australian authorities said that they were "optimistic" the plane will be found in the current search area in the southern Indian Ocean.
The southern portion of the Indian Ocean search area had "the highest probability" of containing the remains of Flight 370, Australian officials said.
Because of a medical emergency, efforts to find the remains of Malaysia Airlines Flight 370 have been interrupted for the second time this month.
Led by Australia, the effort to find the missing Malaysia Airlines Flight 370 already has covered about 27,027 square miles of the Indian Ocean.
Since the 2014 disappearance of a Malaysia Airlines flight, more carriers are deploying systems for gathering information about planes in the sky.
The Australian vessels Fugro Discovery and Fugro Equator were reportedly on return routes Monday.
In the 18 months since a Malaysia Airlines jet disappeared from radar, the Malaysian government has spent $75 million to find the missing plane.
A resident of the Philippines says his relative spotted wreckage of a plane with a Malaysian flag inside on the island of Tawi Tawi.