Unscheduled :
unscheduled
English Meaning :
(Adjective : Not scheduled or not on a regular schedule)
(Adjective : Not scheduled or not on a regular schedule)
Example : Hamilton's truck is running well after the first pit stop, but we cut a tire and have to make an unscheduled pit stop.
Hamilton's truck is running well after the first pit stop, but we cut a tire and have to make an unscheduled pit stop.
Word Example from TV Shows :

an UNSCHEDULED video-chat,
The Big Bang Theory Season 7, Episode 4

an UNSCHEDULED video-chat,
The Big Bang Theory Season 7, Episode 4