We have issued policy guidance in the USCIS Policy Manual clarifying when H-3 nonimmigrants may participate in training provided on the property of an academic or vocational institution.
Generally, H-3 trainees cannot participate in training provided primarily at or by an academic or vocational institution. The updated policy guidance in the USCIS Policy Manual clarifies that, if other H-3 requirements are met, training that happens to take place on the physical property of an academic or vocational institution may qualify if the training program is primarily created, offered, and sponsored by a government agency or other nonacademic or nonvocational entity.
This guidance clarifies rather than changes policy.
Official news published at https://www.uscis.gov/newsroom/alerts/uscis-clarifies-policy-on-location-of-h-3-training