No, unfortunately, I thought I had, ordered it, opened it and saw that it had no AUX, wanted to return it, Digitec didn't take it back! Because of hygienic reasons! although I had not used it.

Since the Samsung Smartwatch 3 has Bluetooth, as well as a music memory and music control, and the Sennheiser HD 350BT have Bluetooth, you should be able to connect the Samsung Smartwatch 3 with these headphones and accordingly listening to music would also be possible.