Amantchi, who joined the club in late July, made 20 appearances and scored twice during his five-month stay. His recent strike secured our passage through to the Isuzu FA Trophy fourth round with victory at Leamington.
The 25-year-old now heads back to League Two high-flyers Walsall.
Goalkeeper Broome was loaned in from Bolton Wanderers in November, following an injury to Oliver Whatmuff at our win over Tamworth.
The recently turned 24-year-old appeared four times and kept two clean sheets in his first two outings.
Rochdale Football Club would like to extend our thanks to both players for their contributions and wish them well for the future.
