Englishfor English speakers
unforeseen
—
adjective
(= unanticipated, unlooked-for, out of the blue)
not anticipated
unanticipated and disconcerting lines of development
— H.W.Glidden
unforeseen circumstances
a virtue unlooked-for in people so full of energy
like a bolt out of the blue
consequence
Noun
—
A consequence is a result of an action, decision, etc., often a bad result.
As a consequence of your bad behavior, you must stay after school.
The consequences of lying to your parents are usually bad.