1. Depression in US and collpase of stock exchange cause America to call in loans, Hit German economy.resulting in mass inemployment 33% or 6 million.
2. This made the government unpopular and weak as they didnt know what to do and made mistakes. it also made the Nazis appealing as they promised jobs and a stronger Germany.
3. Hindenberg thought he could control Hitler and invited him to be Vice Chancellor, Hitler got himself made Chancellor as he price of his support.
Hitler then went about consolidating his power.
Without the depression that sequence of events would not have happened.