Final answer:
Argentina's leader in the 1930s, General José Félix Uriburu, was influenced by Italian fascism after he seized power and implemented policies like banning political parties and suppressing the constitution.
Step-by-step explanation:
The South American country whose leader was influenced by Italian fascism in the 1930s is Argentina. General José Félix Uriburu seized power in Buenos Aires in 1930 and was heavily influenced by the fascist regime of Benito Mussolini in Italy. He implemented policies such as banning political parties and suspending the constitution, similar to the fascist approach in Italy.