The Kurgan group Kotorc III was located 1.2 km southeast of the settlement of Kotorc Pogost and included 34 sand mounds of varying diameters, with some reaching heights of 70 cm. The group has been fully studied.

Under all the mounds, except for Kurgan No. 1, burials were found according to the practice of inhumation in grave pits with a western orientation and seasonal deviations. Under some mounds, there were two burials, conducted at the same or different times. The earliest burials date back to the mid-11th century, while the latest are from the 12th century, indicating that the cemetery functioned for no more than 150 years.

Fragments of calcined bones were found in some mounds, and the floor of Kurgan 17 covered a pit with an undisturbed burial according to the practice of cremation on its side. At the edge of the kurgan group, a trench revealed the remains of an earlier non-kurgan burial ground, destroyed during the construction of the kurgans, similar to the partially studied burial ground Kotorc IX.

Kurgan No. 1, which stood alone, was built by the population of the long kurgan culture. It contained three unaccompanied burials according to the practice of cremation on its side. Its construction dates back to the period of the long kurgan culture, that is, to the 6th-9th centuries.