Recovering a deleted report in TCR
How can we recover a deleted report in TCR?
If it a product-provided report, then check if the report package (.zip) is available in the folder TCRComponent\cognos\deployment and re-import the package and select the needed reports and delete the rest.
If it is a custom report, then the only way to recover it back is to see if you have a backup and restore the content store Database to a date prior to the one when the report was deleted.
NOTE: In this process you will lose any reports that have been developed post the Database backup.