Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
President of Russia
The Constitution of Russia limits the election of one person to the Presidency to two consecutive terms. Since the constitution contains no ruling on a total number of terms that a President may serve, a former president may seek re-election after sitting out one complete term.