Amazon has no direct presence in Switzerland, but you can order a fraction of its products from neighboring countries. Many products are not available, mainly because nobody wants to deal with customs once the product crosses the EU boarder.

Amazon itself never moved into Switzerland in the first place for many reasons (small market, unusual customs situation, relatively high salary for warehouse workers), and in the meantime the largest Swiss supermarket chain created an Amazon clone which became hugely popular pretty much immediately: Galaxus.ch