Sr. Sheila Costello,

Mowlam Nursing Home, Sligo and formerly of Our Lady of Mercy, 3 St. Patricks Avenue, Sligo and Castlerea, Co. Roscommon - peacefully at Sligo University Hospital on May 1st, 2022.

Predeceased by her parents; John and Cecelia, her brothers Sean, Eamon (Bro. Hillary) and Fr. Liam O.F.M. Sadly missed by her sister Maura, brother-in-law Eamon, nephews, nieces, Sisters of Mercy, relatives, and friends. R.I.P

Reposing at St. Patricks Avenue, Sligo from 3pm to 5pm on Tuesday for family and close friends only please (Due to Covid Restrictions).

Removal on Wednesday to St. Anne's Church, Sligo to arrive for Mass of Christian burial at 11.30am. Burial to follow in Sligo cemetery.

Mass can be viewed live on

COVID 19 restrictions apply and we would request social distancing and mask wearing be adhered to at all times.

Enquiries to Seamus Feehily and Son, Funeral Directors, Upper John Street, Sligo.


Johnny Biesty
Sincere sympathy to the Costello family and the Mercy Nuns on the death of Sr. Sheila. May she rest in peace.
Johnny Biesty
sincere sympathe to the Mercy Order on the death of Sr. Sheila.A lovely lady.May she rest in peace.
Sorcha Ní Ghacháin Beannchor Iorrais,Co.Mhaigh Eo
Go ndéana Dia trócaire ar anam an tSiúir Síle .Leaba imeasc na naomh duit agus suaimhneas síoraí a chara.. Déanaim comhbhrón le do ghaolta agus le Siúracha na Trócaire. Mo bheannacht oraibh uile.