Portugal has slid back into more political uncertainty after its third government fell in as many years when Prime Minister Luis Montenegro lost a confidence vote in Parliament.

Portugal’s Parliament ousted the center-right government in a vote of no confidence on Tuesday, forcing the third national election in little more than three years.

Portugal's parliament will vote later on Tuesday on a motion of confidence in the minority centre-right government, which looks set to be rejected, triggering the country's third early general election in just over three years.

Portugal is heading to its third early election in just over three years after parliament toppled Prime Minister Luis Montenegro’s center-right minority government in a confidence vote on Tuesday night.