Which amendment was bring violated by not allowing blacks to assemble in groups of 3 or more?

The violation of the right to assemble by not allowing Black individuals to gather in groups of three or more infringes upon the First Amendment of the United States Constitution. The First Amendment guarantees freedoms concerning religion, expression, assembly, and the right to petition the government. Restricting the ability of individuals to assemble based on race specifically undermines these constitutional protections. Such laws are often seen as discriminatory and a violation of civil rights.