Top US Presidents who did not complete their full term. Here is a list of 6 of them here

President John F Kennedy

William Henry Harrison (1841) had the shortest tenure ever when he passed away from illness 31 days into his term

Image: The Kumachan

Zachary Taylor’s life (1849–1850) following his 16 months in government died of Cholera

Image: Thomas Legion

Abraham Lincoln (1861–1865): After serving for 4 years and 42 days, he was assassinated to begin his second term.

In 1881, 20th US  President James A. Garfield was assassinated six months into his presidency.

Image: Wikipedia

William McKinley (1897–1901): After serving 4 years and 167 days, 25th US President was assassinated early in his second term.

Image:Wikipedia

John F. Kennedy (1961–1963): After two years and thirty-six days, he was assassinated in his third year.