Is it possible to return only the problematic records during batch review?

It depends on how the 50 records were submitted in Busabase. If each record has its own Change Request, you can request changes on the three problematic requests and approve the others.

If all 50 are operations in one bulk Change Request, review and merge apply to that request as a whole; there is no “approve 47, return 3” action inside it. Do not approve that combined request while the three bad records are still in it. Ask the agent to revise or split the proposal so the clean records and the three needing correction are in separate requests, then review each request. We have recorded the need for partial batch review; the exact behavior and timing are not yet decided. Does your agent currently submit one bulk request or 50 separate ones?