Former Lib Dem leader Jo Swinson said she was proud that the party had been the "unapologetic voice of Remain" during the General Election campaign.
"Many people will look at the last few weeks at these results and be filled with dread about the future of our country.
I'm worried, too," she said.
"I'm proud that the Liberal Democrats have been the unapologetic voice of Remain in this election, giving people the chance to choose to stop Brexit.
Obviously it hasn't worked."