The player in question tested negative for the virus on Monday, before returning a positive test on Friday.
Four other players, who have been identified as close contacts with the individual, were removed from Sunday’s game, according to an FAI statement.
The statement read: “Stephen Kenny’s Irish side tested positive for COVID-19 ahead of the Nations League match against Wales at Aviva Stadium, following UEFA’s final round of testing.
“A player – who cannot be named at the moment – tested positive on Friday after testing negative on Monday but his case is in no way related to that of the backroom team member who tested positive last Monday .
“Discussions with HSE late at night have identified four other players as close contacts of this positive case and they have been removed from the day’s squad for today’s game against Wales. ”
The news comes three days after forwards Aaron Connolly and Adam Idah withdrew from the squad – Connolly was due to start – hours before the Euro 2020 play-off semi-final with Slovakia, which Ireland lost 4- 2. punishments.
The move came after a non-football staff member tested positive in Bratislava, with both players sitting next to him on the flight from Dublin.
However, the FAI revealed that the test actually produced a “false positive” result.
The statement continued, “In another development, the FAI can now reveal that the staff member who tested positive for COVID-19 on Wednesday in Bratislava, may have received a ‘false positive’ result.
“Two other tests carried out on the individual on Saturday did not confirm any trace of COVID-19. HSE and UEFA have been informed of this result. The FAI will now discuss the matter with UEFA.
“In light of these developments, the FAI would like to make it clear that it has complied with all UEFA and HSE COVID-19 guidelines regarding player availability and staff welfare around Slovakia against the Republic of Ireland.
in Bratislava on Thursday evening. ”
The development has left coach Stephen Kenny facing a major reshuffle ahead of the Wales game and the trip to Finland that follows on Wednesday night.
The statement said: “Manager Stephen Kenny will review his options for Wednesday’s UEFA Nations League game in Finland following today’s game against Wales. FAI to review all COVID-19 protocols with UEFA and HSE after
the game of Finland. ”