gnome3-session software package provides virtual package provided by gnome-session, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gnome3-session
gnome3-session is installed in your system.
Make ensure the gnome3-session package were installed using the commands given below,
$ sudo dpkg-query -l | grep gnome3-session*
You will get with gnome3-session package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Virtual packages |
| Package | gnome3-session |
| Version | |
| Description | virtual package provided by gnome-session |
| Sub Section | virtual |