Yes it was. We only have one single copy of a poorly-made Coptic translation of it, because by a freak accident someone recently found it in a jar that had been buried for almost 2000 years. We have a few tiny scraps of a Greek version, but that's it. Everything else was burned. Why do you think there's such a complete lack of any texts from before the 3rd or 4th century? That just so happens to be about the time the church began persecuting "heretics" and burning their books. What happened to all the extra-canonical books, and the original versions of the canonical ones? Where are all the Marcionite Bibles? Where is the gospel of the Hebrews, Ebionites, and Nazarenes, and the "Judaikon"? How about Secret Mark? Most of the gnostic books? What happened to the so-called Q source? Why was the original Hebrew of Matthew only kept by Jews? Where is the book of Enoch? The Hebrew of certain apocrypha books? The gospel of Peter? Why are all these important scriptures missing? Most of them survived well into the middle ages and even revolutionary times. It's because the church persecuted "heretics" and burned their materials because they didn't want anyone reading them. If anything still survives it's locked up deep within the Vatican's secret archives.