Dark Souls 3 has a respec feature in the game that you can access after progressing quite a bit into the game. You have to go to an area called The Cathedral of the Deep by accessing the cleansing chapel bonfire.
You will encounter an NPC called Rosaria who will allow you to respec your stats and also change your appearance. You have to join her covenant first to be able to do the aforementioned things.
You need an item that you can get while PvPing while being in her covenant or just exploring the world.
I would recommend you to respec at the end of the game where you can try out different builds or if you seriously messed up your playthrough by putting points in wrong stats.
Our review of the game can be found here.
Here’s a video that shows how to do it.