Set auto reminder emails to be sent out 3 days before the finish date

edited 12/09/19 in Smartsheet Basics

I'm using a Gannt view spreadsheet and creating a timeline for event work. I'm trying to figure out how to set an automation that will send an email reminder to the contact in the "Assigned To" column 3 days before the "Finish" date column. I've read a few support blogs and I'm not finding anything to help!


Anyone know how to do this?