When you delete a price rule in coreSTORE, the price rule is not actually deleted from your coreSTORE, it is just moved to the Deleted Price Rules screen. If you need to view or retrieve a price rule from this screen and return it to the Price Rules sub-module, first go to the Inventory module (1) and select the Price Rules sub-module (2).
Next, click on the "..." button (3), and select Manage Deleted Price Rules (4).
On the Deleted Price Rules screen you can use the search bar to narrow down the price rule you are looking for by (A) typing in what you are looking for.
The deleted price rules list will show you a list of the price rules that you have deleted from your inventory. It tells you how many item kits you have deleted (B), and for each price rule, there is a checkbox (C) that you can check to select a price rule or price rules, and columns (D) that tell you details about the price rule(s).
In order to retrieve a price rule or price rules from this screen and return it to the Price Rules sub-module, use the checkbox (C) to select the price rule(s) that you would like to retrieve, and a couple of options will show up above the deleted price rules list. You can undelete the price rule(s) by clicking on the Undelete button (E), thereby returning it to the Price Rules sub-module, or if you selected the wrong price rule(s), you can click on the Clear Selection button (F).
Once you are done managing your deleted price rules, click the Done button (G) to return to the Price Rules sub-module.