The 2018 World Rugby Americas Pacific Challenge was the third tournament of the Americas Pacific Challenge, which is a development competition for the Americas and Pacific island nations. The competition was hosted by Uruguay with all games played at the 14,000 capacity stadium Estadio Charrúa in Montevideo. Samoa A won the tournament for the first time, winning all three of their matches.
With six teams in the tournament and a limitation of three matches per team, a "split pool" format was used. The field was split into two pools, with teams in one pool only playing the teams in the other. The competing teams were:
Pool A
Pool B
Final standings for combined pools:
All times are local UYT (UTC-03)
The matches were announced on 22 August 2018.