List of best mirrors for IP address 3.144.227.3, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/g/gtk+3.0/libgtk-3-0_3.24.24-4+deb11u4_armhf.deb