All matches have their dates/details here:

http://www.fcbarcelona.com/football/first-team/calendar





Fifa dates:

2014
01-09 September- Official or Friendly Matches
06-14 October - Official or Friendly Matches
10-18 November - Official or Friendly Matches

2015
17 January - 07 February - Africa Cup of Nations 2015
23-31 March - Official or Friendly Matches
08-16 June - Official or Friendly Matches
11 June - 04 July - Copa America 2015
07-26 July - CONCACAF Gold Cup 2015



If you don't want to miss any of the international matches of Barça players you can check out the calendar here:

Neymar

  • Brazil - Argentina 11/10/2014 (Beijing)
  • Japan - Brazil 14/10/2014 (Singapur)


Messi, Mascherano

  • Brazil - Argentina 11/10/2014 (Beijing)
  • Hong Kong - Argentina 14/10/2014 (Hong Kong)


Claudio Bravo

  • Chile - Bolivia 14/10/2014 (Antofagasta)
  • Chile - Perú 10/10/2014 (Valparaiso)


Piqué, Jordi Alba, Sergio Busquets, Iniesta, Pedro

  • Slovakia - Spain 09/10/2014 (Zilina)
  • Luxemburg - Spain 12/10/2014 (Luxemburg)


Rakitic

  • Bulgaria - Croacia 10/10/2014 (Sofia)
  • Croacia - Azerbaidjan 13/10/2014 (Osijek)


Luis Suárez
Even being banned, he is allowed to play friendly matches and he is called-up with his national team

  • Saudi Arabia - Uruguay 10/10/2014 (Jeddah)
  • Omán - Uruguay 13/10/2014 (Muscat)


Sergi Roberto, Munir, Sandro (sub21)

  • Serbia - Spain 10/10/2014 (Jagodina)
  • Spain - Serbia 14/10/2014 (Cadis)


Ter Stegen (sub21)

  • Ukraine - Germany 10/10/2014 (Cherkassy)
  • Germany - Ukraine 14/10/2014 (Essen)