cuándo volverá

when will [he/she/it] return

→ cuándo
phrase Rare #26,718
when will [he/she/it] return Used in questions or indirect questions about a future return. The subject is usually understood from context.
SP: No sé cuándo volverá Tom.
EN: I don't know when Tom will return.

Pregúntale cuándo volverá.

Ask him when he'll be back.

Dime cuándo volverá Tom.

Tell me when Tom will be back.

Dígame cuándo volverá Tom.

Tell me when Tom will be back.

Decidme cuándo volverá Tom.

Tell me when Tom will be back.

No sé cuándo volverá.

I don't know when he'll return.

Acaba de haber un apagón en toda la zona y no sabemos cuándo volverá la luz.

There has just been a power outage across the entire area and we don't know when the power will be restored.

Díganme cuándo volverá Tom.

Tell me when Tom will be back.