was missing, was lacking, was left (remaining)
We were missing a player.
Dios, ¡esto era lo único que nos faltaba!
God, this is the only thing we were missing!
— Pixote, la ley del más débil (1980)
Lo que nos faltaba, perdernos esa cena.
The last thing we needed was to miss that dinner.
— State and Main (2000)