preterintentional

adjective2

1. •
   (rare) Additional to or beyond what was intended.

   • There was no evil spell, as at the sorceress's shop, but perhaps jactura [Latin: “about to be cast”]: preterintentional. — 1965
2. •
   (rare) Of a crime: more serious than the lesser crime that the perpetrator intended to commit instead.

   • A crime— […] is preterintentional or beyond the intention, when an injurious or dangerous occurrence is derived from the act or omission which is more serious than the one desired by the agent. — 1940