You can do a maximum of two story missions after it without issues.
If you have more than one mission left, I mean.
I always save it to be Legion's mission and Tali's loyalty mission because bringing Legion along for that is the dopest shit.
http://guidesmedia.ign.com/guides/9846/images/slowpoke.gif https://i.imgur.com/M8h2ATe.png
https://i.imgur.com/6ezFwG1.png