From Longman Dictionary of Contemporary Englishill-timedˌill-ˈtimed adjective TIME/RIGHT OR WRONG TIMEhappening, done, or said at the wrong time OPP well-timed His remarks were ill-timed.
Examples from the Corpus
ill-timed• His remarks are ill-timed and inappropriate.• After an unfortunate and ill-timed brush with the law, it was almost impossible for Marinello to arrest his downward spiral.• It was as if an ill-timed or ill-executed gesture on his part and his world would collapse.• I should have thought it was very ill-timed to feature this.• Choose your method: Stupid penalties, ill-timed turnovers, the works. 