unscheduled

/ ʌnˈʃɛdjuːld /

adjective

1. not arranged or planned according to a programme, timetable, etc

Example Sentences

Harris was scheduled to head to Detroit but aides said she'd be making an unscheduled stop once she was in the air.

From BBC

Police detained four people over an “unscheduled demonstration,” according to multiple outlets.

From Los Angeles Times

Diddy has been denied bail twice and will remain imprisoned until the unscheduled trial begins.

From Salon

But, with a preference for non-verbal communication and a tendency to work from home, are we losing the ability for unscheduled and informal conversations?

From BBC

In that moment, enveloped in sound, I tried to let go of my attachment to the relationship that was not meant to be — to let those other imagined dates sit unscheduled.

From Los Angeles Times