To quarantine an individual reference, go to References > Edit references and search for the RefID. Click the Quarantine Reference button.
To quarantine references in bulk, go to Reports > Datarama and generate a report including the references you would like to quarantine. Then, click Run Report. Below the report, click Quarantine # References. This will send all the references in your report to the Quarantine.
Note: a reference cannot be sent to the Quarantine if a reference with a matching RefID already exists in the Quarantine. Similarly, a reference cannot be restored from the Quarantine back into your Project if a reference with a matching RefID exists in the Project.