How can I select date at least 3 days in the future and exclude weekends

[Duy Nguyen Truo]

I have a variable type Date so I want to select at least 3 days in future and exclude weekends, selection of any date as less than 3 days, then there should be error message. 
Please reply asap.
Thank you.

[Anurag Tripathi]

Check this out, has the script and explanation on how to build this

Solved: Adding days excluding weekends - ServiceNow Community