Most likely result of an osteotomy
I would make sure your doctor did not perform osteotomies at the time of surgery, this seems to be the most likely explanation. Its a weird location for anything else to account for the lump, especially if it is hard. This can be corrected with a repeat oseotomy perhaps.
Bump Near the Eye After Closed Rhinoplasty
It certainly looks like an abnormal contour from a lateral osteotomy. However, you say there was no breaking of the bone. So it is very perplexing. You would have to rely on your surgeon to get to the bottom of this.
Bump after rhinoplasty
The bump you describe is often where the bones are cut. Check again with your surgeon whether or not this was done.
Hard bump on the side of the nose after rhinoplasty
You say you did not have a lateral osteotomy, or fracture, though the bump in your photo seems to lie along the line where such a fracture is made. Your surgeon will have the best insights as to why the bump might be there.
Bump After Rhinoplasty
Being that you didn't have an in fracture of the nasal bones, it is difficult to say with only pictures the etiology of the nasal bump on the right side of your nose. Consult and trust your surgeon.