Insert Rows into a Table at Chosen Location?

I would like to create a tool that updates a standalone table. Periodically, new rows will be added and deleted. Is it possible to insert a row at a particular location (i.e., between the 3rd and 4th row), or do you have to insert the row at the end and use sorting to get the rows into the order you want them to be in?

Thank you for any information you are able to provide.