Which rank is denoted by the collar device of three silver five pointed stars?

The rank denoted by the collar device of three silver five-pointed stars is Lieutenant General. In military insignia, the number of stars represents the rank, with three stars specifically indicating the rank of Lieutenant General. This rank is typically above Major General and below General in the hierarchy, indicating a high level of authority and responsibility within the military structure. The correctness of this answer stems from the standardized insignia system used across various branches of service, where each star symbolizes a specific rank. Understanding this insignia helps in recognizing the military structure and the responsibilities associated with each level of rank.