You have the option to come to UZH as either a regular visiting student or an invited visiting student. Regular visiting students follow course work during the set semester dates while invited visiting students pursue a project (e.g. research, writing a thesis).
You are eligible as a visiting student if you are enrolled at a recognized foreign higher education institution and only study or pursue a project at UZH for a certain duration. In order to be admitted as a visiting student you need to be enrolled at your home university during the whole duration of your stay at UZH and cannot acquire a UZH degree. There is no general right to be granted admission.
You can find more detailed information about the two types of visiting students as well as the admission requirements, deadlines, application process etc. here: