Acamar III was an inhabited planet. It was the third planet in the Acamar planetary system and located in the Beta Quadrant. The atmosphere was capable of supporting humanoid life-forms. This was the homeworld for the Acamarians, a warp capable humanoid species. The planet was governed by an uniglobal representative government. The legislative body was known as the Acamarian Ruling Council. This government was headed by a sovereign. In 2366, the sovereign was Marouk.
In that year, the USS Enterprise-D enlisted the aid of Sovereign Marouk to end the Gatherer raids on Federation outposts. Upon completion of this mission, the Enterprise returned the Sovereign to her planet. (TNG: "The Vengeance Factor")