Lowry received his first call-up to the full Australia squad for a friendly against the Netherlands in Sydney and the Asian Cup qualifier against Oman in Melbourne in October.[65] He did not play in either match.[66][67] On 11 May 2010 he was selected as part of Pim Verbeek's 30-man provisional squad for the 2010 World Cup,[68] and travelled to South Africa, but was not included in the final 23-man World Cup squad.[69] Lowry was named in Han Berger's 18-man squad for an August 2010 friendly against Slovenia, but he did not appear in the match.[70][71]
On 23 November 2011, Lowry was again loaned out to play in the Championship, this time to Millwall until 3 January 2012. He followed Aston Villa team-mate Nathan Baker who also signed on loan for Millwall two days earlier.[19] Lowry made his Millwall debut three days later, where he played 90 minutes, in a 0–0 draw against Crystal Palace.[20] His impressive display at Millwall soon earned a loan extension.[21] Weeks later on 13 January 2012, Lowry was sent-off in the 22nd minutes after stamping on Nikola Žigić, which saw Millwall lose 6–0.[22] Three years on after signing for Birmingham City, Lowry stated, quoting: "Whatever club I play for I fully commit to that club at the time. I play with my heart on my sleeve. Sometimes in the past I have gone overboard but I was a younger player then, I have learned a lot from these types of experiences. But I am an aggressive player, that’s the way I like to play and I can’t change the way I play. I will use my experience now and be a bit more clever."'[23]
In the 2013–14 season, Lowry suffered a minor thigh strain in the club's pre-season friendly.[35] Despite this, Lowry remained in the first team under the new management of Steve Lomas until he received a straight red card after a foul on Will Hughes, in a 5–1 loss against Derby County on 14 September 2013.[36] After serving a three match ban, Lowry remained on the bench without playing for four matches[37] Lowry made his first team return on 2 November 2013 when he came on as a substitute for Scott Malone against Burnley. However, his return, after spending two months without playing, was a disastrous when he scored an own goal, which saw Millwall drew 2–2.[38] After this, Lowry was out of the first team, demoted to the substitute bench between mid-November and mid-December until he made his return on 26 December 2013, in a 4–0 loss against Watford.[39] On 28 January 2014, Lowry was sent-off for the second time this season in the late-minutes against Sheffield Wednesday after fighting with Giles Coke, who also was sent-off as well, with both side drew 1–1.[40] After serving a four match ban,[41] Lowry was in the first team throughout February and March until he suffered a foot injury that kept him out for the remainder of the season.[42] Lowry went on to finish the 2013–14 season, making twenty-two appearance.
Presidents Cup: Closed out his second consecutive Presidents Cup appearance with a 6-and-4 victory over Emiliano Grillo, helping lead the United States to a 19-11 win over the International Team. Compiled a 3-0-1 overall record, highlighted by victories the first two days with teammate Justin Thomas in Foursomes (6 and 4 over Charl Schwartzel and Hideki Matsuyama) and Four-ball (3 and 2 over Branden Grace and Louis Oosthuizen).

On 27 January 2016, Lowry returned to Australia after a decade away from Australia when he signed a two-and-a-half-year deal with A-League side Perth Glory.[59] Upon joining Perth Glory, Lowry said of the move, quoting: "I've got a lot of experience behind me now and I want to use it to guide the young lads who are in this young squad. I've spent 11 years in England and it's shaped my football over there and I'm really happy to be here and get stuck into the games"[60] 
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