Board Thread:Theories and Speculation/@comment-32369776-20170708034118/@comment-24808887-20170716130501

Thekillman wrote: There is no actual mention of them dying out, just that the Senju clan no longer exists. Which rules out extermination.

So, they probably got disbanded. Sorry for late response, but I don't remember at any point manga stating that clan no longer exists can you cite at least one occurrence, without it claim of whatever happened to Senju is baseless.