No. It is a two person race (well, sort of). As someone who thinks Clinton is the lesser of evils, I hope they let Gary Johnson in, but it would not really be fair.
That said, there is an extremely remote chance GJ could actually be president. He is polling between 9-12 percent and Mitt Romney and others are considering endorsing him. If he gets a single state, and some say he could get a few, he could deprive either candidate of the 270 needed to win.
It really is crazy (and interesting) that each party picked their absolutely worst candidate, because normally (to the extent this would ever be normal), if no one gets 270, the president is picked by the house, who likely would pick their candidate.
But some say that if the republicans remain in control of the house, they would not pick trump if he did not get the 270, they might pick Gary Johnson. Stay tuned….