Yeah she can, term limit doesn't apply for people who took the position more than 2 years into a term. LBJ, for example, was allowed to run for a thirs time, but opted not to because of how unpopular Vietnam war made him.

Edit: exact text:

No person shall be elected to the office of the President more than twice, and no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once.