The latest robbery happened at 9:09 a.m. Friday at 2005 Concord Pike, police reported this morning.
As in the earlier incidents, the robber displayed a gun, demanded money from a teller and they complied.
No one was injured in any of the robberies.
The earlier crimes happened at Artisans’ Bank, 3631 Silverside Road in Talleyville. One was at 9:18 a.m. on May 14 and the other was at 9:30 a.m. on June 8.
The robber is described as a white man 25-35 years old, about 5-feet-11 with medium build.
Police asked anyone with information to contact Detective J. Paul Doherty at 302-365-8438.