"Give me three day's notice"

[Quaeso]

What is the Spanish idiom(s) for something like: "Give me three day's notice and then I will be able to do it."

[Rusty]

There's no idiom, as far as I know.
The noun 'notice' could be 'notificación', 'aviso' or 'preaviso'. Note that 'de' would follow the noun before stating the amount of days/weeks/etc.

Prior to providing the amount of days/weeks/etc., you could also use the verb 'avisar' followed by the preposition 'con'.

I've seen «días de antelación» or «días de anticipación» used, like so: «Avísame con tres días de antelación».

[Quaeso]

Thank you!

[AngelicaDeAlquezar]

I agree with Rusty:
"Avísame con tres días de anticipación/antelación*" would be the usual translation.
*"Antelación" is for a higher register. In daily speech, most people say "anticipación"

You can also say:
- Si me avisas tres días antes, puedo hacerlo.
- (Formal speech) Por favor notifíqueme con tres días de antelación para poder realizarlo.

[Quaeso]

Very good, thank you!