Concatenate rows based on a shared ID using DAX

I have a table with data as below (representative only):

and I want to display a table combining the countries rows so that there is only one entry for each ID, as so: 

I need to do this using DAX and not in PowerQuery because there is a different part of the report where the countries do need to be separate. 

I am trying to write a measure but can't get it to work. I've tried using various combinations of concateneatex, combinevalues, calculate, filter, selectcolumns... but the closest I've gotten is for it to spit out a one row table listing all countries without regard to the ID, like this: 

I tried to modify this solution https://community.fabric.microsoft.com/t5/Desktop/Concatenate-text-stored-in-several-rows/m-p/3196154#M1076668 like so: 
CALCULATE(CONCATENATEX('Table','Table'[Country]," "),FILTER('Table','Table'[ID]=EARLIER('TABLE'[ID]))

but the EARLIER formula is giving an error.

This feels like it should have a simple solution but I can't crack it, thanks!