The 2018 Sudamérica Rugby Sevens was the twelfth edition of the Sudamérica Rugby Sevens, the continental championship for rugby sevens in South America.

Five national teams competed for two slots, not only for the 2018 Hong Kong Sevens qualification tournament, but also for participation at the 2018 Rugby World Cup Sevens.

[1] The main South America Sevens series took place over two legs, one in Punta del Este, Uruguay, and one in Viña del Mar, Chile.

The initial seedings were as follows:[2] All times Uruguay Standard Time (UTC−03:00) Group A Group B Group C Challenge Trophy 5th Place Cup [3] All times in Chile Summer Time (UTC−03:00) Group A Group B Group C Challenge Trophy 5th Place Cup [4]