overanalysis
noun
over·anal·y·sis ˌō-vər-ə-ˈna-lə-səs 
plural overanalyses ˌō-vər-ə-ˈna-lə-ˌsēz
: excessive analysis
overanalysis of a small problem that obstructed the real issues
He's a man of lists and overanalysis; he sweats the details.
Jason Feifer
Jason Feifer… citing the old saw about overanalysis leading to paralysis. Dan Brown and Patrick Maloney
Dan Brown and Patrick Maloney
Word History
First Known Use
1886, in the meaning defined above