Removing a Suppression Rule in Inspector

To examine the list of Suppression Rules, right-click on the Project Name in the Solution Explorer tab, choose Intel Parallel Inspector/Project Properties/Suppressions and you can then select and Remove the rules that you do not want to be applied on the next run.

Another way to do this is to Run the analysis again, but in the Configuration Dialog, click the Private Suppressions tab and choose "Mark Problems" instead of "Delete Problems".   After the run, the suppressed Observations will show up with a strike-through, and you can then right-click and choose "Do Not Suppress"