Pontypridd's Geraint Walsh is dejected at the end of the game at Sardis Road.
The Pontypridd faithful left Sardis Road frustrated and baffled after seeing Leinster A snatch advancement to the final of the British and Irish Cup due to a superior try count in a 22-22 draw.
Leading 22-15 with full time up, twice Ponty backs Owen Jenkins and Simon Humberstone kicked the ball dead thinking referee Craig Maxwell would blow for full time, but twice play continued.
Seven minutes into added extra time, winger Andrew Boyle scored Leinster's third try which Carl Marsh converted to send the game into extra time.
With neither side unable to break the deadlock when the match went into extra time, the full-time Irish side claimed the semi-final honours due to scoring three tries compared to Ponty's solitary effort from Joel Raikes who darted over in the first spell.
Defeat will be a bitter pill to swallow for Paul John's gutsy side who were just seconds away from earning that coveted final spot.
Ponty's part-timers put in a huge defensive effort thoughout and despite being on the backfoot in the dying stages as Leinster went for the jugular, the home side refused to budge but due to a lack of clear-cut scoring opportunities, weren't able to trouble the scoreboard attendant which enabled Leinster to go through in an absorbing contest.
Raikes' try and three penalties by Humberstone had put Ponty into a 16-12 halftime lead with Leinster responding with tries by Brendan Macken and Ben Marshall with the remaining points coming courtesy of Marsh's boot.
Marsh and Humberstone exchanged kicks at goal and when the Ponty fly half added two further penalties the match had swung in Ponty's favour.
But Boyle's late effort extinguished any hopes Pontypridd had of making the final.
All roads lead to Cardiff on Sunday for the SSE SWALEC Finals Day at the Millennium Stadium. Cambrian Welfare tackle Ystradgynlais in the Bowl final, Ystrad Rhondda play Newcastle Emlyn in the Plate final while defending champions Pontypridd face Bridgend in the Cup final.
WRU Chief Executive Roger Lewis, Deputy Minister for Culture, Sport and Tourism Ken Skates and WRU Chairman Gareth Davies earlier this week launched a new competition in conjunction with the WRU unveiling its archive room.
Welsh players and management joined Deputy Minister for Sport Ken Skates at the Pierhead Building, Cardiff Bay earlier this week to reveal the Union's pioneering school-club hub initiative has been so successful the project will now almost double the scale of the original project.
The Scarlets, Newport Gwent Dragons, Cardiff Blues and the Ospreys look ahead to Judgement Day III which sees the Blues take on the Ospreys (2.30) and the Dragons tackle the Scarlets (4.45pm) at the Millennium Stadium tomorrow afternoon.
Ystradgynlais and Ynysddu played out a titanic struggle at Taffs Well in the SSE SWALEC Bowl semi-final. At the end of the game neither team could be separated after a 15-15 stalemate but Ystradgynlais go through on try count.
Blues strike first in JD III battle - Newport Gwent Dragons lock Andrew Coombs, WRU referee Dylan Llyr Jones and Cardiff Blues hooker Matthew Rees decide dressing room allocations for Judgement Day III
Wales Under 18 captain Calum Haggett has received a conditional offer to read Biomedical Science at St Anne's College, Oxford. WRU chairman Gareth Davies went to meet Calum and Coleg y Cymoedd Principal Judith Evans to wish him luck in his exams and pass on some of his personal experience.