Troisième lac Boswell is a Lake located in Chandler; Le Rocher-Percé, Quebec.

• Latitude: 48° 19' 44'' North   (decimal: 48.3288999)
• Longitude: 64° 53' 35'' West   (decimal: -64.8930999)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Chandler; Le Rocher-Percé
• GPS Coordinate Locator Map: Troisième lac Boswell Lat/Long