inopportune

hankala, sopimaton unsuitable for some particular purpose

That was a most inopportune spot for a picnic.

"It appears I come at an inopportune time, madam," said he, "when my friend, Mr. Rochester, is from home; but I arrive from a very long journey, and I think I may presume so far on old and intimate acquaintance as to install myself here till he returns."

The inopportune arrival of the bus cut short the interesting conversation.