@CKeast Hi.

If you want to manually unsuppress subscribers follow these steps.

1. Find and open that profile. You can open the profile by typing his email address in the search bar.

2. On the right side, among other profile properties, you should see a “Channels” section with a “Show suppression details” option. Click on that option.
 

3. In the details you should see the method of suppression and a “remove” option. Click on the “remove” option and the subscriber will be removed from the suppression list.

Never manually unsuppress subscribers without their consent.

Hope this helps!