Third Thomas Shoal, known as Payao Shoal in the Philippines, Bãi Đồng Cam in Vietnam, and 和平暗沙 in China, is a reef in the north-west of the Spratly Islands in the South China Sea. It is located north of Flat island, and north of Mischief Reef.

The reef is one of three martnamed after Thomas Gilbert, the captain of the Charlotte: First Thomas Shoal , South of the Second Thomas Shoal.NGA Chart 93046 - SE Dangerous Ground Second Thomas Shoal , South East of Mischief Reef.Third Thomas Shoal , North East of Flat Island - some distance N of the Second Thomas Shoal.NGA Chart 93045 - NE Dangerous Ground

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