Occasionally sub inner-pages got deleted

eg: domain.com/page1
I have generated backlinks by pointing my sub-pages, I myself what are sub-pages, If some pages got deleted what it will happen.
Coz of this if I get any issues in my site.
I have generated backlinks by pointing my sub-pages, I myself what are sub-pages, If some pages got deleted what it will happen.
Coz of this if I get any issues in my site.