Prime Minister Mihai Tudose has been forced out by the PSD as he lost a power struggle with the party boss.
President Klaus Johannis named Defense Minister Mihai Fifor as interim prime minister, but the political crisis continues.
The social democrat was forced to resign when he lost the support of his party.
It's the second time since June that the PSD has ousted one of its own.
Liviu Dragnea rules over the party but is barred from political office because of a criminal conviction.
All Sources: EuroNews Deutsche Welle Deutsche Welle