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.

What does it mean by untimely?

1 : at an inopportune time : unseasonably. 2 : before the due, natural, or proper time : prematurely went untimely to the grave. untimely. adjective.

What's a word for being late?

1 tardy; slow, dilatory; delayed, belated.