I doubt that the call above will give you the last 3 items only. I think you meant &limit=`3` instead of &level, right?
If you want to ignore normal resources, &where is the way to go. For example:
[[!Wayfinder? ignoreHidden=`1` &startId=`0` &excludeDocs=`54` &where=`[{"template:!=": "3"}]`]]
This is for one of the 404 pages in one of my projects. Template #3 is one that is for a series of objects that a customer can edit, in this case a menu with loads of delicious dishes

I don't want those to be displayed, because they're all technically not HTML content but a lot of TVs, such as image, description, name, price, etc.
The where clause keeps those from showing in the wayfinder tree. You can use it with pretty much anything. In your case, you can adding the articles container to &excludeDocs and customizing the where clause to anything that uses the articles template.
That should work.