German phrase
Ich überlasse Ihnen ~.
Meaning
I leave ___ up to you
When to use it
You let them decide. It is polite and somewhat formal.
Example dialogue
Ich überlasse Ihnen die Entscheidung.
I leave the decision up to you.
Vielen Dank, ich werde darüber nachdenken.
Thank you very much, I will think about it.