If your data store i Base SAS, (without audit enabled - which is by far the most common), you have to resort to various SAS logs on you compute server.
For batch updates check under the BatchServer directory in your configuration.
Interactive SAS sessions use WorkspaceServer, but the default setting is not to keep logs stored on the server.
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Assuming DDS stands for SAS Detailed Data Store then it depends how/where it's installed. If it's SAS tables then the only place where you could find any information about deletions are SAS logs. If "deletion" has been done properly then at least for SCD2 type tables there wouldn't be an actual deletion but just an expiration of a row and these you could identify in the table.
If the DDS has been installed on a database then there might be some DB logging turned on that keeps track of deletions. You would need to talk to a DBA to figure out what logging level has been turned on and how to access this log information.
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