In new webmaster tool in the section 'Index coverage'>'Excluded'>'Submitted URL not selected as canonical'

I am getting 3 internal links in the section "Submitted URL not selected as canonical" of my website. As I am not sure for which reason these internal links are showing.

Although I had updated canonical tags for these 3 links as well. 

If you have any solution then please update me. 

(I am not sharing links cause may be my account marked as spam)

Thanks!