Will the market crash come Monday?

The market doesn't give a toss about the G7. Tariffs might cause a slight tremor.

A market crash does not happen on any specific day, it goes on and on, and sometimes officials will argue for a long time about whether it is a crash or not. For instance, in the 30s, bankers did not want to admit that the country was in a recession, so they made up a new word: depression.