Tumaslı (also, Tumasly and Tumaslu) is a village and municipality in the Sharur Rayon of Nakhchivan, Azerbaijan. It is located 12 km in the south from the district center, on the plain. Its population is busy with farming and animal husbandry. There are secondary school, library, club, kindergarten and a medical center in the village. It has a population of 605.