What happens to Omar Sy's character "Barry"?

I watched the film again last night, and you do in fact see Barry one more time, in the Costa Rican first aid camp, for just a little less than 2 seconds, and he said something to someone off screen. I could not make out what he said, was about 2 words or so. I guess maybe we might see something in a sequel or an interview or something, but my guess is that it will just be assumed that he

1. somehow knew he was safe from the other three raptors (not having seen one hit with a rocket) and the Indominus Rex,
2. jogged the substantial distance back to the raptor paddock through the unfamiliar woods in total darkness,
3. found an operational vehicle and drove to the main compound,
4. and flew out on the last available evacuation vehicle, the helicopter that Lowery called in.

I am dissatisfied with this, but that's the fault of the movie, and I doubt it'll ever be covered in any more detail.

Usually, these are always the scenes that get the snip during the edited process.

I can think one example off the top of my head: In Watchmen, there is quite a significant character 'Hollis Mason' who plays the original 'Nite Owl'. In the cinema version, he is never heard from again after a scene with Daniel (new Nite Owl). However, in the directors cut, there is quite a chunky and gruesome death scene that was cut out of the final film. Why? Time restraints maybe?

I think the answer to your question is: The scene was shot but likely to have been cut out, as although Barry had quite a bit of screen time, he isn't a significant character. (Much like Hollis Mason)