que eso sucediera

for that to happen

→ que
phrase Uncommon #22,307
for that to happen Introduces a subordinate clause after verbs expressing wishes, doubts, permission, or possibility. Sucediera is the imperfect subjunctive form of suceder.
SP: Nadie esperaba que eso sucediera tan pronto.
EN: No one expected that to happen so soon.

Tom jamás dejaría que eso sucediera.

Tom would never let that happen.

No quería que eso sucediera.

I didn't want that to happen.

Tom no quería que eso sucediera.

Tom didn't want that to happen.

No hay nada que puedas haber hecho para evitar que eso sucediera.

There’s nothing you could have done to prevent that from happening.

Me sorprendería que eso sucediera.

I would be surprised if that happened.

— Jojo Rabbit (2019)