[9][10] In May 2013, Singson successfully regained his seat as representative of Ilocos Sur's first district, defeating political opponent Bertrand Baterina.

In February 2014, Baterina filed a disqualification case against Singson before the Supreme Court of the Philippines, seeking to disqualify the latter in a desperate attempt to gain a congressional seat.

[11] In late July 2010, it was reported that Singson had been arrested on the 11th of the month at the Hong Kong International Airport for allegedly possessing 26.1 grams of cocaine and 2 tablets of Valium.

[13] In September, the court extended his bail due to him undergoing medical treatment; it also delayed Singson's plea bargaining on October.

The commission subsequently scheduled the special election on May 28,[25] where he was succeeded by his brother, Vigan Vice Mayor Ryan Luis Singson.

[26] His father Chavit said a few weeks before Ronald's January 18, 2011 release that his son won't reenter politics and will instead focus on his businesses.

[27] Singson ran for his old House of Representatives seat for the 2013 elections; his brother Ryan instead contested Ilocos Sur's governorship, which was being held by their father Chavit, who will not run.

Singson switched party from Nacionalista to Nationalist People's Coalition and attempted a comeback to the same seat in 2019; however, he lost to Savellano.