This is the US Embassy in Switzerland. The US government has an office in Bern as well as in Liechtenstein. If you are in need of assistance such as registering your marriage, death or birth or for that matter a new passport then you have to contact the offices in Bern. They offer full US citizenship services. Their details and a map has been listed below. You will note that the US Embassy is not to far away from the Thai Embassy in Switzerland in Switzerland.
US Embassy in Bern
Details for the US Embassy in Switzerland
Address: Sulgeneckstrasse 19, CH-3007 Bern, Switzerland
Tel: 031 357 70
Fax: 031 357 73 20
To get more information on the US nonimmigrant visa, see visit: https://ustraveldocs.com/ch/.
Note: Emergency Passports are only available at the US Embassy Bern.
U.S. Embassy Bern – American Citizens Services (ACS)
Online Appointment System
Consular Agency – Zurich
Consular Agency – Geneva
You can see on this website if you are ineligible for a US Visa under the USCIS rules. You can also see how to cancel a K1 Visa if you have a change in heart as well. This applies everywhere. The same as at the US Embassy in Turkey and the US Consulate in Perth as well.