Horneburg 3 is located about 125 m south of Horneburg 2 in the western corner of a wooded area. The site is oriented almost in east-west direction. It is a very heavily destroyed long barrow. Visible is still a 48 meters long and 6 meters wide hill. In the middle lies the rest of a chamber. Visible are still three supporting stones. From the enclosure only two stones are preserved.
Along with Horneburg 3 this tomb is station 6 on the current map of the necropolis Daudieck walk.
Visited May 2019