Unlike Check Destination URL Enhanced Script(where settings allow you to pause a bad landing page), the Sitelink URL Enhanced Script does not have the capability to pause the sitelinks which lead to 404 error page.
We don't have this capability built in because at the moment Sitelinks can either be edited or deleted but cannot be paused.
The only way to pause non-performing sitelinks is by pausing the campaign which is not a feasible solution. And this is the reason why we update you with the dead sitelinks using the spreadsheet report. You can take inputs from the spreadsheet to delete or edit the sitelinks in the AdWords interface.
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