Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2249087_1 (world_rank INTEGER, south_american_rank VARCHAR)

### Question ###
Name the least world rank for south american rank 3

### Accurate SQL ###

SELECT MIN(world_rank) FROM table_2249087_1 WHERE south_american_rank = 3