How can I assign partial JSON to script variables

So I have a JSON file which I grep for certain variables:

cat myfile | grep -E "group_(var1|var2|var3)"

The output comes out like this:

"group_var1": "value1"
"group_var2": "value2"
"group_var3": "value3"

I'd like to interpret this in my bash script such that I would end up with the three variables themselves so that I could manipulate them further.

e.g.

echo "$group_var1  $group_var2   $group_var3"

So far I've tried with read -a, awk '{ print $1 $2 }', but none of that brought me closer to my desired result.

The furthest I got was removing the quotes with the following code, but after that, I'm stuck:

params=`cat myfile | grep -E "group_(var1|var2|var3)"`
params=${params//\"}

echoing params now nets me this:

group_var1:value1,group_var2:value2,group_var3:value3,

But now I'm stuck...

Edit & solution:

I went digging further and I got it working by crudely invoking awk for each variable I wanted.

group_var1=`awk '$1=="group_var1:" { sub(",", "", $2); print $2 }' <<< $params