The compound with the formula Sc(ClO4)3 is called Scandium(III) perchlorate.

Here's why:

* Scandium (Sc) is the metal cation with a +3 charge.

* Perchlorate (ClO4-) is the polyatomic anion with a -1 charge.

* To balance the charges, we need three perchlorate ions for every scandium ion.

Therefore, the correct name is Scandium(III) perchlorate.