Premature
WordNet
adjective
(1) Uncommonly early or before the expected time
"Illness led to his premature death"
"Alcohol brought him to an untimely end"
(2) Too soon or too hasty
"Our condemnation of him was a bit previous"
"A premature judgment"
(3) Born after a gestation period of less than the normal time
"A premature infant"