Chris Coleman may not continue as Wales manager when the current World Cup qualifiers end next autumn, with the 42-year-old suggesting he could return to club management overseas.

Wales's 2-1 defeat by Croatia at the Liberty Stadium on Tuesday evening left the principality 10 points behind the visitors and Belgium with only four matches of the phase remaining.

While this means Wales have all but mathematically failed to reach a major championship again, with their last success in 1958, Coleman will consider his future when his contract ends after the final match against Belgium on 15 October.

Last January Coleman took over the national side following the death of Gary Speed and has won three and lost six of his nine games in charge. He said: "I have never once said I have any plans other than to be here. I do get excited by the players that I have got to work with, but I also get frustrated – I am not used to the idea that the next four months we have no game. I struggle with that, I am not going to hide it.

"The last 10 days have been great, I've really enjoyed it, thrived on it and now there is nothing for three or four months. I am not sure I will ever totally get to grips with that if I am honest. I am happy with the group of players we have got, encouraged about what we could do when everybody is fit. If we can finish strongly in this campaign, and have a kind group in the next one, who knows? To be honest I am just disappointed at the moment losing when I didn't want to lose."

Coleman has previously managed Fulham, Real Sociedad, Coventry City and Larissa, and when his tenure with Wales does finish he favours working abroad once more. "My next job will probably not be on these islands," he said. "I like working abroad. I have no ambitions to join a British club. After this campaign is up I would like, if I am not going to be an international manager, if my time was up, I would probably want to move abroad to be honest. For a manager it is more tactical. You learn a lot."

Coleman has already turned down offers while with Wales. "In the last 14 to 15 months I have had one or two opportunities," he said. "When I was not winning, and under pressure. But I didn't jump ship. I would not. This is my country. We have four games left and then we will see what they [the Welsh FA] have planned. We will see after that. Are they happy? I don't know. Saturday morning I should think they were very pleased with me [after beating Scotland]. Tuesday night may be different."

Ashley Williams, the Wales captain, believes it would be "stupid" if Coleman did not continue for the Euro 2016 campaign. "I've said for a while he's doing a great job. He had a tough start, they were unbelievable circumstances to come into a job [following Speed's death]," he said. "And I think everyone could see that we all struggled. But in the last few games you can really see it getting back to where it was under Gary Speed and that's pleasing.

"It would be stupid … I can't believe anyone is talking about changing the manager now."