2015–present: America and the departure of Miličević
 
Performing in Manchester, England during the Monolith Tour
On November 3, 2015, it was announced that Thirty Seconds to Mars are working on their fifth studio album. In August 2016, the band revealed to have signed to Interscope Records.The group later unveiled that they would embark on a North American tour with Muse and PVRIS, which took take place from May to September 2017. In August 2017, "Walk on Water" was announced as the lead single from the band's fifth album. Thirty Seconds to Mars then performed the song at the 2017 MTV Video Music Awards featuring special guest Travis Scott.

 

During the ceremony, Jared Leto received media attention for his tribute to musicians Chester Bennington and Chris Cornell, who both died earlier that year.
On January 25, 2018, Thirty Seconds to Mars released "Dangerous Night" as the second single from their upcoming fifth studio album. In February 2018, the band officially announced the Monolith Tour with Walk the Moon, Misterwives, K. Flay, Joywave, and Welshly Arms. Thirty Seconds to Mars later confirmed America as title of their fifth album, which was released on April 6, 2018.

 

The album received polarizing reviews from critics and debuted at number two on the Billboard 200, becoming the band's highest entry on the chart. America also reached the top ten in seventeen other countries, including number one in Germany and Austria.

During the first leg of the Monolith Tour, it was announced that Miličević would be taking a break from touring due to personal matters. On June 11, 2018, he officially announced his departure from the band.

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BAND MEMBERS

 

Current members

• Jared Leto – lead vocals, rhythm guitar, keyboards (1998–present)

• Shannon Leto – drums, percussion (1998–present)

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Former members

• Tomo Milicevic -  lead guitar, violin, keyboards (2003–2018)

• Matt Wachter – bass guitar, keyboard (2001–2007)

• Solon Bixler – lead guitar, backing vocals (2001–2003)

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Current Touring Members

• Stephen "Stevie" Aiello – bass guitar, keyboards, backing vocals (2013–present)

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Former Touring Members

• Tim Kelleher  – bass guitar (2007–2010, 2011

• Braxton Olita – keyboard, rhythm guitar, backing vocals (2009–2011)

• Kevin Drake – rhythm guitar (2001–2002)

• Matt McJunkins – bass guitar, backing vocals (2011