Cllr. Carlin said the proposal would be formally put at a meeting of the Council on Monday.
She commented: “The national flag has always formed part of the celebrations in Strabane without any difficulty or controversy.
“We see no reason why that cannot continue and why the national flag cannot be carried as part of the official event to celebrate the national patron saint.
“Council officers made the decision that no flags should be included in the absence of a formal policy on flags and emblems which is not yet in place in this relatively new Council.
“However, as the history of this parade has shown, it is perfectly possible to run a genuinely inclusive and cross-community event where flags are carried in a respectful manner.
“Therefore, Sinn Féin’s proposal will seek the inclusion of the national flag in the official parade while also redressing the need for a Council policy on this issue going forward.”