The New York Liberal Party was founded in 1944, but it went off the ballot in 2002. It hadn’t quite ceased to exist, however, and in 2013 petitioned for a place on the New York city general mayoral election. However, its nominee for Mayor, John Catsimatidis, has withdrawn. Catsimatidis had also run in the Republican primary and had lost, although he would have been free to continue to be on the Liberal Party line in November if he had wanted. See this story.
After Catsimatidis withdrew, the Liberal Party considered replacing him with Jack Hidary, but in the end decided to have no nominee. See this story.