Delete MySQL rows not found in original Excel Input

Hi, I am new to kettle but making great progress :)

I have a transformation written that successfully takes a spreadsheet of data and updates corresponding rows in a MySQL table.

Now I find that part of the updated data is deleted rows that are no longer necessary. Is there a way to process this automatically? I know I could create an excel sheet of record IDs that need to be deleted and get rid of them that way, but I'd rather not have to manually figure out which ones those are.

Thanks