Untimely

Part of speech: adjective (a.)

Not timely; done or happening at an unnatural, unusual, or improper time; unseasonable; premature; inopportune; as, untimely frosts; untimely remarks; an untimely death.

Part of speech: adverb (adv.)

Out of the natural or usual time; inopportunely; prematurely; unseasonably. "Let them know . . . what's untimely done." Shak.