unforeseen

Situations or events that were not anticipated, often used in the plural.

Results or effects of an action that were not predicted, often used in the plural.

An issue or difficulty that was not anticipated.

A change that was not expected or predicted.

A cost that was not planned for.

A situation where something happens later than expected due to an unpredicted reason.

A serious, unexpected, and often dangerous situation requiring immediate action.

A sudden and terrible event that was not predicted.