Did the United States get three Atomic bombs off Germany they refused to use, but instead used on Japan by the United States?

No, this is an ignorant understanding of world war 2!

It is obvious Hitler was never a gentleman that Prabhupada claimed, based on his belief that Hitler refused to use the atomic bomb during World War 2, unlike the Americans. 

The fact is, Hitler was no gentleman, he murdered 26 million Russians, 6 million Jews and millions more in Europe and North Africa during World War 2.

Furthermore, the idea Hitler had 3 nuclear weapons but would not use them, but instead taken by the United States and two used on Japan is historically wrong and not accepted by bonafide historians of World War 2. 

Based on historical records, the assertion that the United States captured three unused atomic bombs from Germany and used them against Japan is not historically accurate, it is nonsense according to all historical records.

While this statement appears in conversations involving Srila Prabhupada (as recorded in Vaniquotes), historical consensus indicates the following -

German Nuclear Program - 

Germany did have a nuclear research program, but it did not produce a functional atomic bomb, let alone three US Development, Germany never even come close to developing nuclear weapon.  

The U.S. developed its atomic bombs independently through the Manhattan Project. The bombs dropped on Hiroshima ("Little Boy") and Nagasaki ("Fat Man") were U.S.-built, using Uranium-235 and Plutonium-239 respectively.

Timeline - 

Germany surrendered in May 1945, while the first U.S. atomic bomb test ("Trinity") took place on July 16, 1945, and the first use against Japan occurred on August 6, 1945.

Understanding Prabhupada's statement within the context of his teachings -

Srila Prabhupada often used examples to discuss the morality of war and the actions of world leaders, particularly highlighting the destruction caused by the U.S. in World War II.

"Hitler was a Gentleman" - 

In some discussions, Srila Prabhupada made controversial statements comparing Hitler and the U.S., suggesting Hitler didn't use atomic weapons while the U.S. did, which is mistaken by him because at no point did Germany even come close to developing an atomic bomb, this has been historically proved.

However, Srila Prabhupada also was rightly, not very supportive of the British and their American Allies because of their exploitive colonialism, India was suppressed under British rule until 1947 and Prabhupada oftened critized the British because of not allowing India to rule themselves. 

In this way, followers of Srila Prabhupada often interpret these statements in the context of a wider critique of modern, "demoniac" leaders, rather than a technical lecture on historical facts.

Therefore, while the spiritual and moral criticisms of war within these talks are central to his teachings, the specific technical claim regarding captured German atomic bombs is not supported by strong historical evidence.*/*.