The most significant realignment that occurred at this time was in the North Country, where NY 3 was shifted onto its current alignment between Watertown and Plattsburgh. From Tupper Lake east to Plattsburgh, most of what became NY 3 was previously part of NY 10. The NY 10 designation remained in place from Tupper Lake east to Upper Saranac Lake, forming an overlap with NY 3; however, it was completely replaced by NY 3 from Saranac Lake east. Between Upper Saranac Lake and Saranac Lake, the routing of NY 3 was previously unnumbered, as was the routing from Watertown to Tupper Lake.