In July, Lee repeated his achievements at the Asian Junior by capturing three gold medals at the Championships held in Cheras, Kuala Lumpur, Malaysia where he played a pivotal role to secure the boys' doubles and mixed doubles victories for South Korea and frustrate Malaysia in the mixed team final.

At the Asian Games, Lee and Jung became bronze medalist after losing the semi-finals to Luluk Hadiyanto and Alvent Yulianto of Indonesia in the individual men's doubles event.

With Jung Jae-sung, the rest of the year also resulted in quite disappointing achievements, as he failed to pass the quarterfinals in any major events, except in the French Open.

In mixed doubles with Lee Hyo-jung, they lost in the quarter-finals to eventual winners Zheng Bo and Gao Ling.

However, as Jung had to join the military service for two months, Lee paired with Shin Baek-cheol for the German Open and claimed the title.

Happily, he took the men's doubles title with Jung Jae-sung, conquering China's top pair Cai Yun and Fu Haifeng.

Unfortunately, in the mixed doubles, he and Lee Hyo-jung, who were the first seeds, lost to Thomas Laybourn and Kamilla Rytter Juhl of Denmark in the semi-final, who later became the champions.

On January 17, Lee Yong-dae successfully started the 2010 year by winning Korea Open Super Series in Seoul with Jung Jae-sung.

With Jung Jae-sung in the men's doubles, Lee only made it to the quarter-finals, defeated 18–21, 10–21 by Xu Chen and Guo Zhendong of China.

However, his comeback was successful as he and Jung Jae-sung won the first tournament they played after the injury, Chinese Taipei Grand Prix Gold.

In the Asian Games in November, Lee Yong-dae and Jung Jae-sung helped South Korea men's team to reach the final.

For the individual event, Lee Yong-dae and Jung Jae-sung gained the bronze medal after beaten by Indonesia's Markis Kido and Hendra Setiawan in the last four.

Lee Yong-dae started the 2011 season with a not-so-satisfying result in the 2010 Superseries Finals in Taiwan as he and Jung Jae-sung finished as runner-up.

However, in the mixed doubles, Lee and his partner, Ha Jung-eun, lost to qualifier Liu Cheng and Luo Ying in the second round.

Lee also played in Japan Open, pairing with Ko Sung-hyun again, but they lost in the quarter-finals against Indonesia's Markis Kido and Hendra Setiawan.

In October, Lee Yong-dae and Jung Jae-sung once again defeated Cai Yun and Fu Haifeng 21–16, 21–17 to win Denmark Open Super Series Premier.

Lee Yong-dae and Jung Jae-sung didn't start off the year so well with a loss in their home game at the 2012 Korea Open Super Series Premier losing to Cai Yun and Fu Haifeng in three sets, 18–21 21–17 21–19.

In German Open, Lee and Jung reached the final but lost to unseeded Chinese pair, Hong Wei and Shen Ye.

In June, Lee Yong-dae and Jung Jae-sung won their second Indonesia Open title after defeating Danish Mathias Boe and Carsten Mogensen 23–21, 19–21, and 21–11.

After the 2012 Olympic Games, South Korean national team coach, Kim Joong-soo, decided to pairing Lee with Ko Sung-hyun focusing in the men's doubles.

[12] Lee Yong-dae started the year with his new partner Ko Sung-hyun winning the Korea Open against Mathias Boe and Carsten Mogensen 19–21, 21–13, 21–10.

In January, Lee Yong-dae and Kim Gi-jung were banned for a year by the BWF from playing any international tournament due to their absence during a drug test.

In 2014 World Championships men's doubles final, Lee and Yoo Yeon-Seong surprisingly lost to their compatriots Ko Sung Hyun and Shin Baek-cheol 20–22, 23–21, 18–21.

He won a total of 6 Superseries titles, 4 consecutively, namely Australia, Japan, Korea, Denmark, France and Hong Kong with partner Yoo Yeon Seong, and were top seeds for the Dubai Superseries finals, despite losing to Indonesian rivals Mohammad Ahsan and Hendra Setiawan in the semi-finals.

Lee Yong-dae and partner Yoo Yeon-seong started off the year at the 2016 German Open Grand Prix Gold and lost to compatriots Ko Sung-hyun and Shin Baek-cheol in the finals.

They then contested the 2016 Thomas Cup representing Korea, and won three out of four matches they played, their only loss coming from eventual finalists, Indonesia's Ahsan and Setiawan.

Lee and Yoo then won their first Superseries title of the year, and their third in total, at the Indonesia Open, beating China's fifth seeds Chai Biao and Hong Wei in the final.

Lee announced that he would retire following the 2016 Summer Olympics, with his last tournament being the Korea Open in September in which he won alongside his partner Yoo Yeon-seong against the Chinese Li and Liu pair.

Lee Yong-dae made a comeback in the men's doubles and partnered up with Kim Gi-jung, and won the titles of Spain Masters and Macau Open.

The duo claimed the title after beating third seeded Chinese pair Li Junhui and Liu Yuchen in the final in two straight games.