Is it deer resistant?

Yes

American Hop-Hornbeam is deer resistant.

Ostrya virginiana

Deer: Rarely
Height: 40 ft (12.2 m)
Spread: 30 ft (9.1 m)
Zones: 3–10
Light: Full sun

Tree

American Hop-Hornbeam (Ostrya virginiana)

Photo: ND State Soil Conservation Committee; NDSU Extension and Western Area Power Administration, Bismarck. Courtesy of ND State Soil Conservation Committee. Provided by USDA NRCS ND State Office. United States, ND. · Public domain

Also called Eastern Hop Hornbeam, Hop Hornbeam, Ironwood, Leverwood

More details

Light: Full sun, Partial shade, Shade
Water: Low, Medium
Type: Tree
Maintenance: Low
Growth: Slow
Bloom: Spring
Foliage: Deciduous
Features: Drought tolerant, Flowering, Native
Best uses: Lawn, Shade tree, Specimen, Street tree, Woodland

More in Ostrya

Hop Hornbeam
Ostrya carpinifolia