untimely

adjective
1
happening too soon or sooner than is normal or expected
ناهنگام, زودرس, بیهنگام, زودهنگام, زودتر از موعد
synonym premature
2
happening at a time or in a situation that is not suitable
نابهنگام, بی موقع, نامناسب, بدوقتی
His interruption was untimely.
opposite timely