How can I put only 1 (of 3) social links in header, without hiding others on separate page?

I want only the Instagram social link to appear in the header, but when I hide the others, it hides them on all the other pages as well. I want all three (Insta, FB, & LinkedIn) to appear on my contacts page. Is there a way (css or alternative method) that I can hide the other social links in the header, but NOT on my contact page? Any help is appreciated! 

Hi,

You can share link to your site, we can give code to hide it.

Hi, @tuanphan! Here's my site link: 

mango-silver-f3xz.squarespace.com

Thank you!!!