Picking Different Items Between Two Lists and Creating a New List

I have been reading posts about comparing lists for a couple of hours now but I have not found a post that will deal with my issue (or if I did read it, it was not obvious to me).

Each Monday I run a query in our master Access database to get a subset of items specifically for my needs. Each week this list of items will grow (by the end of the year it could be anywhere between 4K - 10K items). During the week, I will run the same query but it will contain items that have been entered late. I need to be able to pick out these late items and create a new list of them.

In the attached sample workbook (I have removed all of the sensitive cells and have just left the columns I need to work with). I have the first tab which will give me a summary (just a count) of the late items and this is also where I would like to have a list generated of the different items that are on tab 2 but not on tab 3. On the second tab, I have the query results from today (Wednesday). On the third tab, I have the query results from Monday. On the fourth tab, I paste a report which has several numbers I use but I have only left one of them in this sample workbook which is relevant to this task.

Thank you in advance for any assistance on this.