Its all context dependent of course. If you are at a place for three years doesn't mean you can't interview. Three years at an organization is a long time. I've

Its all context dependent of course. If you are at a place for three years doesn't mean you can't interview. Three years at an organization is a long time. I've seen people interview after 6 months at an organization. Depends on the organization. Having a person start interviewing people after three years development experience total is probably not a good idea - depending on what you are interviewing for.