By the end of WWI most countries, including the US had dropped the standard carbine.
The carbine was a cavalry weapon and with the passing of importance of cavalry in a machine gun and long range rifle era, most countries went to an intermediate rifle for all troops.
Instead of a 30" barreled rifle for infantry, a short rifle for artillery, and a carbine for cavalry, most countries adopted a 25" barreled rifle for use by all troops.
What carbines you did see after WWI were almost all specialty weapons, as with the British #5 Jungle Carbine.
The US carbine of WWII was not a true carbine and didn't shoot the standard service rifle cartridge. It was a replacement for the 1911 pistol for use by non-combat troops that might suddenly be attacked in the fast moving warfare of WWII.
The last US carbine was gone with the adoption of the Model 1903 Springfield.
Strangely, the US carbine returned with the Vietnam XM177 and the current M4.