I know that with the buttons in the subform I cannot do it but I was thinking if there is any 'hack' way via deluge.

I have a subform and I fill the first 10 rows for example, then I click submit. For some reason I want to edit again this record and add a row between the 3rd and 4th row in the subform. The manual way is to delete all the rows under the 4th row and then add here the new row

Is there any way to do that programatically?

I know that with the Add Row we can add rows only in the last line.