Any awards of financial support (e.g., fellowships providing tuition and stipend, or assistantship appointments for teaching or research work) are intended to assist students while they focus on their studies. Concurrent employment is therefore limited.
International students on full assistantships (50% research or teaching appointments, for 20 hours of work per week) may not be employed for additional hours of work during the academic year. As long as they are not enrolled over the summer, international students may work full-time on-campus during that quarter. However, Stanford requires that the student be enrolled during any quarter in which they hold an assistantship appointment, including summer quarter. Summer quarter assistantships are therefore limited to 90% FTE (36 hours per week), with concurrent enrollment in at least one unit.
For international students on full fellowship support, there are limitations on additional work hours. Individual fellowship sources may have more restrictive rules than those set by Stanford or the immigration service. Please check Stanford Graduate Fellowships for Stanford's policy.
Please check with your department before assuming that employment is allowed while you are receiving fellowship support.