없었대

wasn't, didn't have, there wasn't

→ 없다
없 not have, be without; be absent, not exist + 었 Past tense + 대 Reported speech (hearsay)
adjective · past tense Rare #30,772
wasn't, didn't have, there wasn't Colloquial reported speech: “(someone) says/said there wasn't.”
KO: 그때는 시간이 없었대.
EN: They said there wasn't any time then.
Forms of 없다

교통사고 신고는 없었대

They said there were no reported traffic accidents.

— 히든 (2005)

유서에 서명은 없었대

They say the suicide note was unsigned.

— 오펜하이머 (2023)

내가 누구 랑 너무 닮아서 어쩔 수가 없었대

They said they couldn't help it because I looked so much like someone.

— 히든 (2005)