untimely

adjective, un·time·li·er, un·time·li·est.

1. not timely; not occurring at a suitable time or season; ill-timed or inopportune: An untimely downpour stopped the game.
2. happening too soon or too early; premature: his untimely demise.

adverb

3. prematurely.
4. unseasonably.

adjective

1. occurring before the expected, normal, or proper timean untimely death
2. inappropriate to the occasion, time, or seasonhis joking at the funeral was most untimely

adverb

3. prematurely or inopportunely

adj.1530s, “coming before the proper or usual time,” from un- (1) “not” + timely. Cf. Middle Danish utimelig, of weather, etc. see come to an (untimely) end.