After a long wait for the S5 mini users and a very short one for Galaxy J3 ones, they all finally get the Android Marshmallow update.
http://www.notebookcheck.net/Samsung-Galaxy-S5-mini-and-Galaxy-J3-to-get-Marshmallow.165240.0.html
Your article is wrong about the usa samsung j3 its out of the box with lollipop 5.1 no update to marshmallow