“The other candidates.”

That is the default shorthand for the three presidential candidates who are not Donald J. Trump or Hillary Clinton: Gary Johnson of the Libertarian Party, Jill Stein of the Green Party and Evan McMullin, the independent.

All three made final pleas to voters on Tuesday, and all three sounded a similar theme: Don’t just vote against someone; vote for someone.

It is unlikely that any of them will win or have a major impact on the final outcome, but this could be the best year for third-party candidates since Ralph Nader ran in 2000 and grabbed 3 percent of the popular vote.

Mr. Johnson, the former governor of New Mexico, wrapped up his campaign in his home state, where he joined sign-waving supporters in Santa Fe.