Nasser Assar is a painter who paints simplified landscapes and is influenced by Eastern painting and philosophy. Assar became acquainted with poetry and philosophy as a child through his father, who was a professor of Eastern philosophy at the University of Tehran. From 1949 to 1953, He studied painting under the supervision of Ali Mohammad Heydarian at the Faculty of Fine Arts in Tehran. He went to Paris and studied in one of the free art schools of Paris (1954-1965). He held his first solo exhibition in 1955 at the Paris Prism Gallery. His work has since been featured in numerous group and solo exhibitions in Paris, Brussels, London, and various European cities. In 1966, he held his only solo exhibition in Iran at Lito Gallery. Assar's first appearance at auctions dates back to 2007 at the Brosto Hewitt Auction.

His fascination with Eastern nature and art, inspired by the Zen painting tradition, is one of the main themes of his works. He first started his career in Iran by drawing trees with abstract space but after traveling to France and understanding the context of modern Western movements, he realized Oriental art to the extent that separation from Eastern spaces was inevitable for him. Acquaintance with Sohrab Sepehri was one of the reasons for his fascination with the Far East and Sino-Japanese culture. Calligraphic movement of the brush in his works is inspired by Chinese and Japanese calligraphy in a balanced composition is one of his artworks features. The color in his works is accompanied by thin or thick uniform tones and delicate, bright, and vivid movement of his brush. Although Assar's Orientalist view overshadows his art, there is always an independent identity in his work that sets him apart from other influential Oriental artists. His audiences experience a minimalistic relaxing but dynamic feeling through his artworks. In other words, despite the eerie atmosphere, a sense of calm and stillness is conveyed to the viewer.

"Assar successfully unites eastern and western worlds without any gesture. He combines his eastern view with the pure and naked essence of Western abstract painting," Aydin Aghdashloo writes about Assar's works. “Assar's very colorful and well-made paintings are windows into the refined soul that can slide and fly beyond the complex anger, greed, and anxiety."