$ sudo apt-get update
$ sudo apt-get install ipython3-qtconsole 

ipython3-qtconsole is installed in your system.

Make ensure the ipython3-qtconsole package were installed using the commands given below,

$ sudo dpkg-query -l | grep ipython3-qtconsole *

You will get with ipython3-qtconsole package name, version, architecture and description in a table

ipython3-qtconsole package basic information: