Well, it's been beyond frozen here with temperatures dipping to -30 Celsius and lower the last several days...

Anyhow, I'm NOT sure if this is a coincidence or caused by the frigid weather: my master bedroom's faucet is not working. No water comes out. However, every other faucet (kitchen's, guest room, shower, etc.) in the house still works...just not the one in the master...

Is it because of the cold weather and I somehow have a frozen pipe?

 

it's possible, does the line to the master faucet run down an exterior wall? If the pipe is frozen i'd be really concerned about leaking water somewhere in the walls.

 

Dougler sounds spot on this one, if it's been that frickin cold outside and your pipes for that faucet happen to run down an exterior wall... bam! frozeness; though in theory the insulation is supposed to help with that.

 

Fawk. Thanks for the input guys...now I'm worried.

But, what's perplexing is why I have running water everywhere else in the house? Heck, the master's toilet, shower, and jacuzzi all still have water...

 

I thought code says you cant run pipes inside exterior walls...

If that is the case, if you have that PEX plastic stuff you probably wont have to worry about pipes bursting. If you have copper you could have trouble on your hands. There wouldnt be much you can do about it other than cross your fingers and wait for warmer weather. The only way to prevent it going forward would be to run the water at a trickle in cold snaps - pretty wasteful.