Swiss citizens are required to have a valid visa to enter India. They can apply for a tourist visa, business visa, or employment visa, depending on the purpose of their visit. Here is the list of Indian visa requirements for Swiss citizens, documents for a visa application including a valid passport, two recent passport-sized photographs, and a completed visa application form. Swiss citizens may also need to provide additional documents such as a letter of invitation, proof of financial means, and a return or onward ticket. The processing time for a visa application is typically 3-5 working days, but it can vary depending on the type of visa and the Indian embassy or consulate where the application is submitted.