This is an original file from an official FIFA 14 installation. Official FIFA 14 DLLs are usually named like fifa14.exe , fifa14_3dm.dll is not standard.
Errors related to this file typically occur because antivirus software flags it as a "false positive" or a threat and subsequently quarantines or deletes it. Why the File is Missing or Failing Antivirus Interference Fifa14.3dm.dll
Trick the game executable into believing it had been legitimately verified through the Origin servers. This is an original file from an official