On 18 July 2003, Pope John Paul II appointed him Titular Archbishop of
Caeciri and
Apostolic Nuncio in
Honduras. Episcopal consecration was given to him by Cardinal
Angelo Sodano on 20 September of the same year; Co-consecrators were Archbishop
Bruno Foresti, Bishop Emeritus of Brescia, and
Giulio Sanguineti, Bishop of Brescia. Pope
Benedict XVI appointed him Apostolic Nuncio to
Mozambique on 12 December 2008. On 5 July 2014,
Pope Francis appointed him Apostolic Nuncio in
Costa Rica. On 25 May 2019, Pope Francis appointed him Apostolic Nuncio in
Monaco, and he accepted Arcari's resignation from that post on 16 May 2023. ==Death==