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_25057 ( "South American Rank" real, "World Rank" real, "Nation" text, "2011 (IMF)" text, "2008 (CIA Factbook)" text )

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

### Accurate SQL ###

SELECT MIN("World Rank") FROM table_25057 WHERE "South American Rank" = '3'