not timely; not occurring at a suitable time or season; ill-timed or inopportune

An untimely downpour stopped the game.

happening too soon or too early; premature

his untimely demise.

prematurely.

unseasonably.

adjective

appropriate , opportune , timely

adjective

a bit previous , abortive , anachronistic , awkward , badly timed , bright and early , disagreeable , early , early bird * , early on , ill-timed , improper , inauspicious , inconvenient , inexpedient , inopportune , intrusive , malapropos , mistimed , out-of-date , overearly , oversoon , premature , previous , soon , too early , too late , undue , unfavorable , unfit , unfortunate , unlucky , unpropitious , unseasonable , unseemly , unsuitable , unsuited , wrong , precocious , inappropriate , inappropriately , inapt , unexpected , unpunctual