How to get it to list the Category name taken FROM the file?

I’ve created a category-3.php to show my entry titles alphabetically whenever category 3 is accessed. But how can I force it to list a category title outside a loop?

For instance, I want it to say:

Category 3 <–taken from the category file
Post 1
Post 2
Post 3

Instead, it’s showing:
Category 3 <–Taken from the post
Post 1
Category 3
Post 2
Category 3
Post 3

Of course, it’s doing that because it’s in the loop, but outside the loop it shows up “uncategorized.” Any ideas how to force it to list a category name within text?

Here’s what it’s doing: https://www.masellis.com/?cat=3