Not at all relevant (6,3,5)
I believe the answer is:
beside the point
(Other definitions for beside the point that I've seen before include "Sentence starts or ends here" , "It's immaterial" , "as the end of sentence?" , "Irrelevant" .)
I believe the answer is:
beside the point
(Other definitions for beside the point that I've seen before include "Sentence starts or ends here" , "It's immaterial" , "as the end of sentence?" , "Irrelevant" .)