In addition to Ireland and Australia, Croatia, North Macedonia, Romania and Slovenia also missed out on a place in Saturday’s final.
Coverage of the semi-final aired on BBC Four.
Rylan Clark-Neal had been due to present the programme, however he was replaced by Sara Cox because of illness.
Singer Newman appeared in a spoof Line Of Duty sketch in the BBC Four programme alongside presenters Scott Mills, Clark-Neal and Chelcee Grimes.
When asked by Clark-Neal why he is submitting a dance track for this year’s competition, he said: “Everyone loves a banger.”
San Marino entry Senhit confirmed during the programme that US rapper Flo Rida will perform with her during the second semi-final of the competition on Thursday.