Spanish phrase
Devuélvemelo cuando ~.
Meaning
Give it back to me when ___.
When to use it
Asks someone to return an item at a later time. Polite request that respects the other person's timing and fits casual to mildly polite situations.
Example dialogue
Devuélvemelo cuando puedas.
Give it back to me when you can.
Vale, te lo devolveré cuando pueda.
Okay, I'll give it back to you when I can.