| Continent: | South America |
| Year: | 1943 |
| Host: | Peru |
| Dates: | 3-17 May |
| Teams: | 6 |
| Venues: | 1 |
| Cities: | 1 |
| Champions: | Argentina |
| Title Number: | 5 |
| Prevseason: | 1942 |
| Nextseason: | 1945 |
The 1943 South American Basketball Championship was the 11th edition of regional tournament. It was held in Lima, Peru and won by the Argentina national basketball team. 6 teams, including Bolivia in their first appearance, competed despite the World War that was currently under way.
Each team played the other five teams once, for a total of five games played by each team and 15 overall in the preliminary round. Placing in the top four qualified a team to move on to the final round.
| width=20 | Rank | width=220 | Team | width=20 | Pts | width=20 | W | width=20 | L | width=20 | PF | width=20 | PA | width=20 | Diff |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 10 | 5 | 0 | 205 | 134 | +71 | |||||||||
| 2 | 9 | 4 | 1 | 223 | 117 | +106 | |||||||||
| 3 | 8 | 3 | 2 | 222 | 166 | +56 | |||||||||
| 4 | 7 | 2 | 3 | 204 | 154 | +50 | |||||||||
| 5 | 6 | 1 | 4 | 121 | 292 | -171 | |||||||||
| 6 | 5 | 0 | 5 | 137 | 249 | -112 |
| width=25% | width=25% | width=25% | |||
|---|---|---|---|---|---|
| Peru | 23 - 21 | Uruguay | |||
| Peru | 38 - 37 | Chile | |||
| Peru | 42 - 32 | Argentina | |||
| Peru | 66 - 22 | Paraguay | |||
| Peru | 36 - 22 | Bolivia | |||
| Uruguay | 39 - 33 | Chile | |||
| Uruguay | 30 - 24 | Argentina | |||
| Uruguay | 72 - 15 | Paraguay | |||
| Uruguay | 61 - 22 | Bolivia | |||
| Chile | 40 - 27 | Argentina | |||
| Chile | 56 - 23 | Paraguay | |||
| Chile | 56 - 39 | Bolivia | |||
| Argentina | 66 - 20 | Paraguay | |||
| Argentina | 55 - 22 | Bolivia | |||
| Paraguay | 41 - 32 | Bolivia |
The top four teams advanced to the final round, where they played each of the other three once. Only the results from this round were used to determine final placing for the top four.
| width=20 | Rank | width=220 | Team | width=20 | Pts | width=20 | W | width=20 | L | width=20 | PF | width=20 | PA | width=20 | Diff |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | 3 | 0 | 106 | 79 | +27 | |||||||||
| 2 | 5 | 2 | 1 | 102 | 82 | +20 | |||||||||
| 3 | 4 | 1 | 2 | 90 | 84 | +6 | |||||||||
| 4 | 3 | 0 | 3 | 77 | 130 | -53 |
| width=25% | width=25% | width=25% | |||
|---|---|---|---|---|---|
| Argentina | 32 - 29 | Uruguay | |||
| Argentina | 34 - 23 | Peru | |||
| Argentina | 40 - 27 | Chile | |||
| Uruguay | 66 - 22 | Peru | |||
| Uruguay | 46 - 27 | Chile | |||
| Peru | 44 - 23 | Chile |