You can use the "Link to Original Data Table" option when you subset the data table. Do your analysis, and then in the subsetted data table, you can select which rows you want deleted. You can then go back to the original data table where the selected rows in the subsetted table will have also been selected in the original table, and delete the selected rows. You will not be able to delete them from the subsetted table, you have to go back to the original data table to do the deletions..
Jim