Ireland were defeated 2-1 by hosts Argentina in the Champions Challenge 1 semi-final on Saturday.
The match in Quilmes was scoreless at half-time before Argentina took a 38th minute lead through Pedro Ibarra.
Guillermo Schickendantz made it 2-0 seven minutes later while John Jermyn set up a tense finish after netting with four minutes left.
Ireland will finish the tournament by taking on Malaysia in the third/fourth place play-off match on Sunday.
The Irish progressed to the semi-finals of the tournament after beating Poland 4-0 on Thursday.
Michael Watt, Conor Harte (2) and Shane O'Donoghue scored in the impressive victory.