untimely
adjective
[ ʌnˈtʌɪmli ]
• (of an event or act) happening or done at an unsuitable time.
• "Dave's untimely return"
Similar:
ill-timed,
badly timed,
mistimed,
inopportune,
inappropriate,
inconvenient,
awkward,
unwelcome,
unfavourable,
unfortunate,
infelicitous,
inapt,
unsuitable,
malapropos,
unseasonable,
untimely
adverb
• at a time that is unsuitable or premature.
• "the moment was very untimely chosen"