untimely

(s) badly timed
- an ill-timed intervention
- you think my intrusion unseasonable
- an untimely remark
- it was the wrong moment for a joke
ill-timed, unseasonable, wrong,
(r) too soon; in a premature manner
- I spoke prematurely
prematurely,
(s) uncommonly early or before the expected time
- illness led to his premature death
- alcohol brought him to an untimely end
premature,

ill-timed unseasonable wrong prematurely premature