Stenosis of nostril is an uncommon deformity. The most common etiology is trauma, other causative factors include congenital malformations and infections such as syphilis, chicken pox, small pox, tuberculosis, rhinoscleroma, and leprosy. Recently, we experienced a case of atresia of Lt. nostril in a 16 years old female patient due to trauma when she was a child and performed triplanar W-plasty technique. So we report this case with review of literature.