Option to automatically reject a requests without a minimum of 3 days notice

Currently, an employee can submit an annual leave request without any delay (e.g. A employee can arrive to work at 9 am, then, they can request to take annual leave for that same day).

I'd like to set up an automatic rejection if an employee requests annual leave without a minimum of 3 days notice. 

We know the approvers can hold on approving/rejecting but we need a minimum of 3 days notice to make a request.